The first episode and explanation to the year long series "Unus Annus" explains the purpose, duration, fate, and the hoped outcome for the channel

Mark and Ethan use a variety of sex toys as substitutes for kitchen utensils to make pancakes and a bacon omelet.

Mark and Ethan prepare their bodies for the afterlife with a Neti Pot Cleanse. This horrifying contraption is designed to clear the sinuses through the application of clean water and brute force.

The boys chase their dreams of joining Joey Chestnut in the MLE hall of fame.

Sensory Deprivation Tanks allow you to slip away from the noise of reality. The physical world melts away to reveal a deeper understanding of one's self and the world as a whole. But they're expensive. So we made our own.

Speed Cup Stacking is a time honored tradition enjoyed by thousands across the globe. Mark and Ethan attempt to learn the ways of the cup to see if they can compete in the global cup arena.

To be clear, Cupping Therapy isn't bad. Mark and Ethan are bad. Cupping Therapy is an ancient healing art that involves vacuums and cups. Mark and Ethan know nothing about it but are committed to trying it for and on themselves.

It's been 12 Years since a certain video about girls and a cup hit the internet... and it's never been the same since. Mark and Ethan google deep to discover where they are now... Also Mark has never seen it...

It is inevitable. It is inescapable. Your fate is sealed, Ethan. Run if you must but it's coming for you all the same.

In preparation for the darkness of the void beyond, Mark and Ethan practice doing each other's makeup in a pitch black room. Which one will get mascara in the eye?

Mark and Ethan strap on their baby hands and get straight to their most important job: Saving lives.

In November of 2019, Mark and Ethan went missing. The only piece of evidence that investigators could find was this tape. Be warned; what you are about to see is disturbing. Viewer discretion is advised.

2 Truths and a Lie is a great way to get to know each other! But why not throw waxing in the mix to spice up the recipe? Also Ethan is going to take a bat to Mark's van very soon.

Poopsie Sparkly Critters are the latest and greatest slime toy sensation. Will they spit or will they poop? This question has been plaguing humanity for all time. Today... we answer it once and for all.

Mark and Ethan are ready to celebrate their last Thanksgiving with you! And with Play-Doh! The tasty treat that's fun to play with and not to eat! Don't eat Play-Doh.

As their voices grow higher, Ethan and Mark's friendship grows stronger.

These memes are dead. Long gone and long forgotten. But we cherish the memory of these memes by bringing them back from the depths of our subconscious and reacting to each other's interpretations of said memes.

Ethan is a man of many talents. Accents is one of them. Watch and be amazed as he regales you all the accents of the world.

A.I. is advancing at an incredible pace and Talk to Transformer is the latest example of Artificial Intelligence being used in new and slightly scary ways. Can this A.I. predict how we will die?

Mummification is the key to eternal life after death. The ancient Egyptians went to great lengths to make the best mummies possible. Now, thousands of years later, with the help of modern technology we have perfected the process.

Chubby Bunny is so last decade. We're bringing challenge videos into the 2020s with the Chubby Gummy Challenge. And yes... it's just as gross as you'd think.

Hypnosis is the art of suggestion. And in 2019 there just so happens to be professional hypnosis videos for sale on the internet! So we buy one and hypnotize ourselves by reacting to it.

Escape Room... such a simple concept. You are trapped in a room and you have to escape. If you fail, the darkness will take you. Ethan and Mark venture to The Basement in Los Angeles to attempt their most devious escape room yet... THE COURTYARD.

Following their challenge from "The Good Kind of Cupping🙂," Mark and Ethan failed to reach two million subscribers in less than a week. As part of their bet, Ethan vandalized Mark's van with a bat.

The Barrel has left us and is with the great mechanic in the sky... but there may still be hope. Through the power of song, we may be able to bring her back. Upload your video using #RIPTheBarrel in the description and we'll pick the winner one week from now. Who knows, maybe... just maybe, we'll be able to make a miracle happen.

A Viking Funeral is when you send your dearly departed down a river on a boat and then light that boat on fire with a flaming arrow. Probably not historically accurate but neither is our recreation.

The boys call upon their German heritage to help them stuff the most delicious sausages in the world.

Mark and Ethan open their inner eye’s through the power of Acupuncture

We tried to make a sensory deprivation chamber and failed miserably. Now... we go to the real deal. With 1500lbs of salt and a whole bunch of water, you'll float to!

Mark reviews Burger King's Impossible Whopper, with Ethan standing behind, waiting to shoot Fischbach in the back with a paintball gun if he were to mention one of the several words written down on a flip chart behind him. Seeing as Ethan shot Mark twice by accident, the two agreed for Fischbach to return the favor at a later date.

Just 2 bros making nude paintings of eachother in the buff. Nothing wrong with it. Nothing right with it either but that's not the point.

You blew us away with the incredible music you crafted in honor of The Barrel. Now The Barrel can live on in our memories. All of the participants in this video are linked below. Please send love to them and everyone who made music by searching #RIPTheBarrel

Through the power of the Life Straw, Ethan and Mark taste each other's urine.

Strange noises have been emanating from Mark's basement. He dares not venture down there. He is no fool. But he knows a fool. He knows the most foolish fool there is...

You helped us reach our goal faster than we ever thought possible. And true to our word, we set out to hand deliver the Golden Play Button directly to one of you!

As an act of friendship, Ethan attempts to calm Mark's stress with a little spa time.

Mark wants to be immortalized in a sculpture but marble is too expensive and experts even more so. Thus the only options left are a Tape Sculpture and Ethan... what's the worst that could happen? Surely Ethan wouldn't be foolish enough to tape Mark's mouth over so he can't breathe right? ...right?

We're bringing Tier Lists into the 2020s with our Pain Scale to benchmark our most painful experiences.

In the spirit of giving, we set to work to fill up Mark's sleigh with the help of our good pal JackSepticEye

Like Icarus who came before them, Mark and Ethan fly too close to the sun. Or at least... they attempt to fly. Shoot for the moon and you'll land among the stars. Shoot for the north pole and you'll land about three inches from where you started.

Mark and Ethan attempt to match Santa's insatiable hunger by consuming a mere fraction of the egg nog and cookies that Santa eats every Christmas.

In an attempt to complete the circle of life, Ethan turns Mark into Saint Nick.

Improving our minds, bodies and souls is our #1 priority, so to preserve our temples of flesh even more, we dipped them in wax.

In search of a controlled environment to let out their anger, Mark and Ethan visit Rage Grounds in Los Angeles. No bottle, mug, or friendship is safe when the boys get a lead pipe in their hands.

Here at Unus Annus we've already rated our worst Physical Pains... so now it's time to rank our Emotional Pain. Watch with care as we discuss the most traumatic experiences of our lives.

Crucifixion was abolished a long time ago but no one was around to stop us so we took some duct tape and tried to attach each other to the walls and doors. Amy, please don't watch this video.

Mark and Ethan challenge each other to a staring contest. After 10 minutes, Ethan falters, losing to Mark. As punishment, Mark deletes Ethan's "I Want To Believe" video from his CrankGameplays channel.

The Presidential Fitness Test is a benchmark to see if the youth of America are up to the arbitrary standards of fitness set forth by the government. Are we still up to the task? Are we still fit?

There is only one RIGHT way to start a new year: By submerging yourself in freezing cold water. #ColdusAnnus

Time has run out. Amy has returned. Will we be able to cover up the evidence of our sin from Amy's eternal peepers?

Bugs are all around us. Tiny little morsels of nutrition just waiting to be cronched. Would you monch an insect? We did...

A bungee jump is a great way to get an adrenaline rush but it's so expensive! So we decided to make our own DIY Bungee Jump right in our backyard! What could go wrong?

Mark and Ethan go into the deep, dark depths of YouTube in search of the best and worst thumbnails.

We are perfectly average humans in every single way. But with the power of technology can we BUILD ourselves taller?

SEIZURE WARNING!! What's the opposite of a sensory deprivation tank? A SENSORY OVERLOAD TANK! Ice bath + Eating Garlic + Bath Bombs + Strobe Lights + Air Fresheners + Loud Music + Icy Hot + Megaphone +...

We won't be around forever... so what better way to immortalize ourselves than recreating ourselves as a cursed mannequin? This certainly won't come back to haunt us...

It's finally time to find out who has big brain and who has smol brain.

Mark teaches Ethan the ways of becoming a man... through hard MANual labor. Little does Ethan know the painful surprise that also comes with growing up...

Mark and Ethan browse A Better Casket (ABC Caskets) for the most suitable coffin to be laid to rest in, as preparation for their channel's inevitable demise in November of 2020.

For as long as humans have been able to speak, we've been able to lie. But thanks to modern lie detector technology, we can finally uncover the truth.

Just two dudes in a hot tub...

In an attempt to fix a hole in the drywall made by Mark in "2 Grown Men Attempt the Presidential Fitness Test", Mark and Ethan pad out the hollow wall with ramen and dissolve its contents with super glue to fill up the gap, in accordance to a life hack YouTube video Mark watched before filming the episode. Every time they apply glue, the video becomes slightly distorted, until the two collapse in an exaggerated manner from inhaling the adhesive substance. The end of the video features a short compilation of all #ColdusAnnus winners.

In an effort to steal his identity, Mark makes a mold of Ethan's face. **THIS IS NOT A TUTORIAL.** We left out lots of vital information necessary to pull this off safely. If you're interested in making your own face mold, there are many comprehensive tutorials on Youtube that can teach you. Always do your research and have a safety plan in place! Unus Annus!

Mark and Ethan challenge each other to see who can hold their breath the longest, with the round format being best of 5. After winning 3-2 against Mark, Ethan gets to delete one of Fischbach's YouTube videos from the "most popular" assortment.

Salsa is the ancient art of dance whereby the dancers express thoughts and emotions through the undulations of their hips. We attempt to learn the mysterious ways of this sanctified dance.

What does it feel like to be old? Well now you can find out with our patent-pending geriatric simulator!

Mark and Ethan sort various life ending scenarios on a tier list to determine which one is most likely going to be the catalyst behind their inevitable deaths. Most of the examples shown in the video are done as a joke, either being heavily exaggerated or unrealistic.

Long have men dreamed of eternal life. Walt Disney famously froze himself to awaken in a world ruled by The Mouse. Today we embark on that very same, frosty journey.

A Taser is NOT a toy! Do not try this at home. Mark is a professionally trained idiot with people on standby to help in case something goes wrong. This is what it feels like to be hit with a taser or stun gun.

Mark and Ethan explore and discuss various YouTube channels that have seen a decline in viewership over the years and whose creators have either went on a hiatus or abandoned their accounts all together.

Mark and Ethan attempt to make a latte. At the end of the video, they announce a contest for their viewers to make their own latte art and submit them under #LattAnnus hashtag. The two announced the winners a week later.

Hypnotherapy is the art of mental suggestion. This isn't the stage entertainment variety of hypnosis. This is real therapy to help people get in touch with what's bothering them deep inside.

Mark and Ethan paint each other's bodies. At the end of the video, they announce a contest to their audience to post artwork of their body paintings under #BodusAnnus for them to judge. The winners were chosen in "Nutball: The Most Dangerous Game."

Mark and Ethan learn the inner workings of the wonderful human body

Ethan messed up. He messed up real bad... and now he has to pay. #Lattannus

Eventually, we'll all have to decide what is to be done with our remains once we pass on. How will you be remembered?

Mark and Ethan explore the wonderful world of cheese. Will they succeed in becoming world class cheesemongers, or will their dreams curdle before their eyes?

Mark and Ethan attempt to replicate life hacks from do it yourself-style YouTube tutorials.

Time never stops marching forward, even for memes. Like a black hole, once memes slip past the point of relevance they fade away into oblivion. Can we can pull them back from the shadows?

While delving into the deepest pits of the Internet, Mark and Ethan discover the secret to everlasting life

In an attempt to keep his youth, Mark transform into an E-Boy

Ethan, a god of beauty, looked upon the world of male beauty and found it WANTING. Taking matters into his own, meaty claws, and redefines exactly what it means to be beautiful.

Mark and Ethan turn to a professional to feed their cupping addiction. Fire cupping... facial cupping... acupuncture cupping... where does it end?

Mark and Ethan experiment with miracle berries-the fruit that turns sour things sweet. Is there a limit to what these berries are capable of?

Yes, you read that right. Mark and Ethan learn how to literally eat fire. Don't try this at home...

While being watched over by the Axe Gods themselves, Mark and Ethan compete to see who is truly the axe-throwing champion

Testing the limits of the human body, Mark and Ethan lay themselves upon a bed of broken glass. So sharp and so deadly that only the BRAVE and the BOLD could survive its teeth.

Mother Nature thinks that she alone holds the power of the elements in her big meaty claws... well what will she think when we CREATE A TORNADO INDOORS?!

Mark and Ethan play nutball, a made-up game where the primary goal is to hurl an object across the room in an attempt to hit the opponent's genitalia. Near the end of the video, Fischbach and Nestor announce the winners of the #BodusAnnus contest.

To become a master of life and death, one must first become a master of the body. A master of movement. A master of mime.

It's perfectly normal to discuss the possibility of how you would murder your friends with those friends and converse in great detail about how you would get away with said murder. We call this the Murder Your Friend Tag haha.

Mark and Ethan take ClickHole's satirical quizzes centered around death.

Mark and Ethan pick concealed cardboard cutouts of various prominent people and fictional characters in order to choose one of them as their perfect Valentine's date.

Mark and Ethan play beer pong while wearing Fatal Vision Goggles to visually simulate alcohol-induced intoxication.

Ethan bought Mark some gifts. Mark does not know why. Ethan does not even know what the gifts are. This is a lesson on how not to spend money.

The eternal question: what came first? Life? Or Death? Fiona helps guide us towards The Truth.

The Presidential Fitness test is so 2019... in 2020 it's time for the KING's ROYAL FITNESS TEST!! And we have a special guest to help us out...

Dog's are incredibly intelligent creatures that can be trained to guard your life. We learn about this process and experience what it feels like to have a dog attack us up close and personal.

Mark and Ethan hone their mighty skills in archery. Not even death can escape their flying arrows.... or can it?

Mark and Ethan examine and discuss satirical takes on the trolley problem.

Goat Yoga. Yoga with Goats. The Yoga that you do with Goats. Yoga of the Goat. The Yoga Goat. #GoatYoga

Make the slime. Play with the slime. CONSUME the slime. Last we saw, the boys were unwilling to even touch the slime. Today they must eat it.

Heaven. Hell. Two places. Two different outcomes. Two sweet boys. Take the quiz. To Find out. Where they belong.

Mark and Ethan apply hair extensions to each other.

Mark and Ethan, joined by musician Leila Pari, craft lyrical genius in record time on the Santa Monica shore.

Sometimes you have to march to the beat of your own drum. But what happens when your drum matches the beat of your heart?

Glass blowing is a hot and dangerous art form that involves skill, patience, and a whole heck of a lot of blowing. Are Mark and Ethan up to the task?

Ethan is back at it again. His sleigh filled to the brim with horrible, horrible gifts to give his lovely friend Mark.

What happens when you combine the thrill of Nutball with the heart-stopping joy of a Taser? You get NUTBALL EXTREME!!

Feeling lackluster in their ghost hunting abilities, Mark and Ethan enlist the help of an expert to lead them through the Old Griffith Park Zoo at night.

Today we explore the inner workings of our mortal coils with a fun lil camera :))))

Today we become the worlds most talented and skilled DJs

Mark and Ethan attempt to teach their dogs, Chica and Spencer, how to play dead within the span of 15 minutes.

Dissection is common in the science classroom. From worms to frogs to fetal pigs... but most of us started with a simple owl pellet.

There's probably a reason why chiropractors are licensed. But we here at Unus Annus never let little things like licenses or "best practices" or "do no harm" get in the way!

Mark and Ethan have finally had enough. Its time for them to fight with their ultimate weapons of destruction: their fists.

Some time after, Mark and Ethan presented a contest for their audience to record an original work or a cover song dedicated to the recently destroyed vehicle and post it under the hashtag #RIPTheBarrel. The two later picked out the winner, Joshua King of JCK Productions, with whom they collaborated, alongside the Gregory Brothers (schmoyoho), to remaster his song as an official music video.

Mark and Ethan get voluntarily pepper-sprayed at Luna's Training Academy in order to better understand the severity of the chemical agent and ways of combating its inflammatory effects.

Henna Tattoos are temporary works of art the represent the temporary nature of life. We cover our eyes and let our souls guide the art.

The stars created us. They Define us. And they will end us. Today we check our birth charts to see what's in store for our little bodies

Life is about understanding one's self. So what better way than to have an enormous machine shoot x-rays through your body to give you a complete overview of your exact body composition!

Mark's mom was a licensed massage therapist at one point in her life. Does her son carry the innate talents to allow Ethan to finally get the Rub-Down he deserves?

We join Jay's Prehistoric Pets to see some amazing reptiles! Lizards, Alligators, and GIANT SNAKES!! Will we be eaten alive?

Mark and Ethan simulate a sauna using a home steamer while substituting hot spring steam with vaporized alcoholic drinks; Mark's consisting of six cans of Red Bull and Ethan's from two bottles of High Life. Near the end, while they're thinking of ideas for their next video, Evan, one of Unus Annus' crew members, suggests a Pee Sauna, to which the two reluctantly agreed to do in the near future.

When $10,000,000 is on the line, Mark and Ethan will stop at nothing(?) to find and capture America's Most Wanted Criminals.

How the Grinch Stole Christmas (with Jim Carrey) is the greatest film ever created. This cannot be disputed.

It's 2020 people. Get with the times. Go into that app store, and find yourself a free app that will predict your future with 100% certainty. The future is now. Much like your death.

Mark and Ethan will never know the TRUE feeling of child labor, but today they attempt to simulate that miracle.

Childbirth is such a beautiful thing! And here at Unus Annus we are experts at taking something beautiful and transforming it into something ever better!

After 2 days of labor and delivery, Unus and Annus have given birth to 2 beautiful baby boys! Now they get to experience the joy of fatherhood.

James Charles joins us as we attempt to run a Military Obstacle Course!

Mark and Ethan test how long they can last without touching their faces, a challenge that was sparked as a result of the COVID-19 pandemic. At the end of the video, Mark and Ethan enlist their audience to keep an eye out for every scene in future Unus Annus videos where they touch their faces while under quarantine. For every reported scene, Mark and Ethan were to donate 100 dollars each to charity, as part of their #TouchusAnnus initiative.

Reddit 50/50 is like a coin toss, where the outcomes are severe mental scarring that will last for the rest of your life... or not that!

Mark and Ethan scour the worldwide web to find the internet's funniest, cringiest, and most satisfying images.

Mark and Ethan play Climbing Trials in VRChat while in quarantine due to the COVID-19 pandemic.

What if you had only one bag to grab before sprinting for your life into the woods? Would you be prepared for an apocalypse situation? If not, turn to your lord and savior, AMAZON, for all your survival needs!

In every Zombie Apocalypse that I've ever been through, I've had to make some difficult choices. Do Mark or Ethan have the GUTS to get through this?

Recruited from all corners of the internet, Mark and Ethan create their own YouTuber Boxing Teams to try and find out who has the strongest punch.

Mark and Ethan browse through Omegle's various video chat feeds in an attempt to find each other using the site's common tags.

Mark and Ethan play GeoGuessr to test their geographic knowledge.

After building a pillow fort for the first time, Mark encourages his viewers to do the same and upload their work to social media under the hashtag #FortusAnnus.

Following up on their #MarchusAnnus challenge, Mark and Ethan were to demonstrate their newly acquired talents. Although, Mark managed to successfully juggle, Ethan never perfected his kickflip, which he jokingly substituted with a montage of various skateboarding stunts from other skateboarders. Additional contest winners were showcased at the end of the video.

Mark and Ethan explore wikiFeet, a photo-sharing foot fetish website.

Mark and Ethan play Hunger Games Simulator using caricatures of various YouTubers, including themselves and their Unus Annus alter egos.

Mark and Ethan google each other in an attempt to find out as many obscure facts as possible.

If you've ever played a classic game of Mad Libs, then you know it is often... not very funny. Luckily for us, Mark and Ethan have devised a foolproof plan to create humor where there is none.

Mark and Ethan test their geographical knowledge of the Unites States by playing various geography quizzes that range from guessing the location of a state to its numerous cities around the country.

Mark and Ethan try out speed reading.

Mark and Ethan explore Incognitube, a website that showcases random YouTube videos with less than 100 views.

Mark and Ethan explore "Forgotten Websites" subreddit and the Wayback Machine in search for obscure web pages on the internet. At the time of making this video, there were a total of 1.5 billion websites, of which less than 200 million were still active.

Mark and Ethan read a number of, supposedly authentic, scary stories off the internet that have happened to people in real life. At the end of the video, the two encourage Unus Annus viewers to post their scariest encounters onto the channel's subreddit for them to read at a later date.

The two are looking over the "25 Ways to be a Better Boyfriend" guide from Inspiring Tips website. After reading the page, Mark criticizes its contents, stating that the article itself is problematic and damaging to people who are simply looking for dating advice. He specifically focusses on the 23rd example of the article that encourages the reader to stay in a hostile relationship in hopes of fixing it, even if it means being emotionally neglected or physically abused by their partner. At the end of the video, Mark redirects his viewers to the description of the video for helpful links regarding domestic violence, urging anyone in need to seek help.

Mark and Ethan look up various topics revolving around the mythical city of El Dorado. After stumbling onto Angel Falls via Google maps, the duo tries to connect the two locations together, with Ethan finding an article discussing City of the Beasts, only to later realize that it was a young adult novel, much to his disappointment.

Mark and Ethan compete against each other in a Wikipedia race, a game in which a player is suppose to get from one, predetermined or random, page to a designated article using only hyperlinks. Before their second run, Mark wagered for the loser of the race, this being Ethan, to donate 50 subscriptions to viewers on their next Twitch livestream, as well as engage in verbal self-deprecation. The third and final run, which lasted slightly over 16 minutes, ended in a draw, as neither of them could find their desired article.

Mark and Ethan watch, what are considered to be, some of the most disturbing videos on YouTube. At the end of the video, Mark and Ethan ask their audience to post any of their own creepy or weird videos under the hashtag #CreepusAnnus or #CrepeAnnus

In an attempt to beat the world record for the fastest YouTube channel to gain 1 million subscribers in a single day, Mark and Ethan ask their audience to subscribe and spread the word of their newly created account, Norbert Moses. At the time, the record holder was Tati Westbrook with 1,281,750 subs after her hit piece against James Charles. Norbert Moses' content consisted of a single promotional channel trailer. Its YouTube icon was a deepfake image of Mark and Ethan's merged faces with the channel banner being the thumbnail from "Where in the World is Unus Annus?" video. The channel failed to beat the record, ending on 612,000 subscribers and was deleted a day after the video's post.

Mark and Ethan attempt to speak in French, Scottish, Irish and English accents.

Mark and Ethan explore the history behind Illuminati, as well various conspiracy theories and memes that revolve around UFO sightings and supposed US military cover-ups.

Mermaids. Piles of Gold. Talking Fish. All this and more lie before us in the great city of Atlantis... and today we find it.

Mark and Ethan read viewer-submitted stories from the Unus Annus subreddit and from the previous video's comment section.

What type of human being is the joint creature known as Unus Annus? What characteristics would this amalgamation of horror entail? Only one way to find out...

Mark and Ethan explore the capabilities of advanced machine learning algorithms; from sentient machinery and full AI facial reconstruction to film restoration and deepfakes.

There are many universal languages. Love. Music. Art. ...Tea? Using the most advanced computational technologies, Mark and Ethan determine if internet drama transcends the limitations of the written word.

Mark and Ethan practice secret handshakes separate from another via video chat. Half way through the video, the duo makes up an Unus Annus handshake under the name #HandMyAnnus (Mark initially wanted to call it #HandusAnnus, but later went with Ethan's suggestion) as a memento of their time spent together on the channel.

We did it with men, so its only fair we do it with women too: Let's find out what TRUE beauty is.

Mark and Ethan browse Bored Button, a website that sends its users to numerous sub-pages where they can either play mini-games or look up various jokes and trivia.

Mark and Ethan browse through the myths behind the Bermuda Triangle, as well as discuss various mysteries and sea creatures that lurk beneath the deep sea.

Mark and Ethan browse and discuss phenomena relating to celestial objects around the solar system, as well as various mysteries and conspiracy theories that surround them.

Did you know Unus Annus has its own subreddit? We kinda forgot.

Here at Unus Annus, we've explored countless mysteries over the past few months. We've discovered El Dorado, Atlantis, and even revealed the horrors of our very own oceans. But no mystery is NEARLY as mysterious as Mark's private life. Let's explore!

Mark and Ethan play around with Pink Trombone, an app with a model of a fully interactable human vocal tract that can synthesize various sounds. The two later discuss the complexities of forming said sounds within the larynx (the human organ more commonly known as the voice box) and look up Utterance robot shortly before ending the video.

Mark and Ethan look up and discuss obscure fetishes.

Mark and Ethan attempt to increase their heart rates by watching various adrenaline-inducing videos, while monitoring their contractions (beats) with Apple Watches. Mark got this idea from watching Crank, a movie about a hitman who was poisoned and must keep his adrenaline constantly flowing to stay alive. The videos showcased were compiled by Amy.

Mark and Ethan look through A.I. generated images of people's faces.

Mark and Ethan explore the reptilian conspiracy theory, the idea of shapeshifting reptilian humanoid creatures ruling the world's governments from the shadows and dictating the outline of human societies.

Mark and Ethan look up a list of people with genetic and physical abnormalities that were labeled as having superpowers. Some examples shown in the video include a man who could consume indigestible objects and myostatin deficiency that would cause people and animals to develop excessive muscles. Throughout the video's run, Mark used an air inflating machine to blow up a giant beach ball in the background that he got from Ethan in one of their previous Unus Annus skits.

As Shrek once told me in a dark alley on a stormy night, "Onions have layers..." That message has been cemented into my mind among other things Shrek whispered into my ear. But in this video we discover the true versatility of the mythical Onion and if there is such a thing as too much Onion.

Unus AnnuSMR. You wanted this. You asked for this. You deserve this. Turn out the lights, turn up the volume, and get ready to relax. You deserve this.

Mark and Ethan attempt to recreate Thick-It Water by using common household ingredients. The video leaves off on a "To Be Continued" sign, as the two would later end up drinking the actual product.

We're all going to have a gravestone someday, so why not create ours preemptively and really make it our own?

Mark and Ethan look up the history of some of the tallest people in the world, real or mythical, with the tallest recorded human being Robert Wadlow at a height of 8'11" (272 cm). Halfway through, Mark goes off-topic about the design of Warhammer's Space Marines; his biggest issue being their large bulky bodies which, realistically, would impair their movement. Near the end of the video, the two find a fake growth serum on Amazon and continue to crack jokes about it till the end of the episode.

Korean is a beautiful language that Mark is currently learning. However he doesn't really know it that well. But that doesn't stop him from attempting to beam Korean directly into Ethan's brain.

Bigfoot. Sasquatch. Another keyword. He goes by many names. But once you see the irrefutable evidence... you will only call him... friend.

A milestone video celebrating the first six months of the Unus Annus channel.

Once again, we look at all the wonderful, funny, and downright disturbing memes you fine folks have posted on the Unus Annus Subreddit.

Mark and Ethan start the video off by exploring the destructive capabilities of nuclear weapons, which included an excerpt from Kurzgesagt's video regarding nuclear warheads, followed by Baby Maps (a webpage that shows a world map of how many babies are born every second in each country) and Life Stats (a webpage showcasing how much the world has changed in statistics between the current date and the date of the user's birth) from Neal.fun website.

Mark and Ethan look up what would be a lethal amount for a single person to individually consume various caffeine-based beverages, pasta dishes and water in one day, separately from one another. Mark later ends the video by performing the Valsalva maneuver, which causes the video's frame to shatter from an implied pressure before the remnant of the glass shard flies towards the screen to show the remaining time till the channel's ultimate deletion.

Following their failed attempt to brew homemade Thick-It Water, Mark and Ethan order a bottle each from Amazon. After drinking it, the two are visibly disgusted, with Mark noting that the water, at least, tasted better than urine.

Mark and Ethan play strip poker, with each player betting their clothes instead of traditional chips, the loser having to strip the amount they bet with. As the two cannot see nor interact with each other, both used their own decks in accordance with the rules. Nearing the end, after losing all of his clothes, Mark goes outside and dives into his pool, with his body floating along the surface. The video then ends with an abrupt jump scare, before cutting back to Mark as he reemerges from the pool and walks off-screen in a crouched position.

You hear that? Off in the distance? That, my friends, is the sound of two gods screaming into the ether. It is the first sound in the morning and the last sound at night. It is the call to end all calls. It is... THE YODEL.

In an attempt to make an omelet while blindfolded, Fischbach straps a phone across his eyes, with its camera facing away from him, and uses FaceTime to communicate with Ethan as he guides Mark through the lens of his camera.

The two play an abbreviated version of the Newlywed game, a social game based on a TV quiz show where the participants are required to provide the same answer to subjective questions, unbeknownst to one another, and see how much they know their partner. Adding their own spin to the game, whoever gives the wrong answer has to consume products that would otherwise be lethal to the other, with Ethan having to drink alcoholic beverages (Mark sustains from drinking alcohol as his body cannot properly process it), while Mark has to eat a spoonful of peanut butter (Ethan has a severe peanut allergy, with even the smallest amount being lethal to him).

Mark and Ethan fashion a female breast out of everyday household items; Ethan makes his by mixing some flour, water, and 2 eggs, and pouring it into a plastic bag, while Mark stuffs a rubber model of a human foot inside one balloon before placing a fully inflated one under his shirt.

Mark and Ethan attempt to learn how to belly dance.

Mark and Ethan invite random people on Twitter to their temporary "Unus Annus Confessional" Discord server for them to confess anything of their choosing to the two hosts via voice chat. All participants' voices were distorted with a voice changer in order to protect their anonymity. After concluding their final session, Mark and Ethan say one final goodbye to the members and proceed to delete the server.

Mark and Ethan each set up a time capsule with launch boxes being used as containers; Mark's lunch box is themed around Five Nights at Freddy's and Ethan's around A Goofy Movie.

Mark and Ethan compete against each other to see who would amass greater viewership on their channel within the next 24 hours. To participate, the audience had to simply choose to watch one of the two videos that represented each character; Ethan representing Unus and Mark representing Annus. To showcase additional support, viewers on either side could purchase their distinct merchandise or brandish each character's spiral pattern as their user icons; Ethan's Unus spiral would emerge from the upper left corner, while Mark's Annus spiral emerged from the lower left. Both videos contained a series of green screen gags that would later be repurposed by Unus Annus fans to create memes, some of which were showcased on the channel at a later date. Ethan ends his video with "Unus Unus", instead of their usual "Memento mori, Unus Annus". Both videos were uploaded on the same day, side by side. The winner was announced the following day.

Mark and Ethan compete against each other to see who would amass greater viewership on their channel within the next 24 hours. To participate, the audience had to simply choose to watch one of the two videos that represented each character; Ethan representing Unus and Mark representing Annus. To showcase additional support, viewers on either side could purchase their distinct merchandise or brandish each character's spiral pattern as their user icons; Ethan's Unus spiral would emerge from the upper left corner, while Mark's Annus spiral emerged from the lower left. Both videos contained a series of green screen gags that would later be repurposed by Unus Annus fans to create memes, some of which were showcased on the channel at a later date. Mark ends his video with "Annus Annus", instead of their usual "Memento mori, Unus Annus". Both videos were uploaded on the same day, side by side. The winner was announced the following day.

The two announce Mark as the winner of Unus Vs. Annus challenge. The video itself showcases four prerecorded clips of Mark and Ethan both celebrating their victory and jeering the other for their loss. The timestamps highlighted in the title of the video sees Mark's triumph over Ethan.

Mark and Ethan attempt to make homemade wine from purple grapes. After spending the entire video grape-treading, the two decide to save their grape juice for a later day.

Mark and Ethan attempt to tear apart a 2010 edition of Greater St. Louis yellow pages. Halfway through, the spine from Ethan's phonebook falls apart, leading him to declare himself a winner, while Mark continues to struggle for the rest of the video, but ultimately manages to rip the book in half.

Welcome to the First Annual Unus Annus Body Building Competition Extravaganza! Who will wear the crown of best bod?

The video opens up in complete silence with an intro card reading "Please spend these 8 minutes and 46 seconds taking action. Check the description for resources." The rest of the video is focused on a single frame that reads "BLACK LIVES MATTER," in reference to the murder of George Floyd and the subsequent protests that followed soon after.

Mark and Ethan attempt to crush watermelons with their thighs. Both of them eventually tire and try other methods, with Ethan bashing his watermelon with various objects to break it apart and Mark biting the top off before splitting it open with his bare hands.

Mark and Ethan mimic superhero poses from various comic books.

Mark and Ethan react to various memes of their green screen edits from the Unus Vs. Annus challenge made by the Unus Annus community. At one point, Mark states that the initial rivalry between the two was an elaborate ruse to get people to do a green screen competition.

Mark jokingly teaches Ethan how to read using Hooked on Phonics, a website dedicated to helping children learn basic reading skills through various mini-games.

Mark is a bad bad man who needs to be exposed for his sins. Ethan is just the right big bold boy to roast Mark to a crisp!

After going over a few illustrations by Trevor Henderson (a Canadian horror artist known as the creator of Siren Head, Long Horse, Cartoon Cat and others alike), Mark and Ethan decide to make their own picture within the next 30 minutes by hiding distorted visual elements in normal looking images. After comparing their results, the two ask their audience to submit similar type of work to the Unus Annus subreddit for them to potentially make a video on it. Nearing the end of the segment, Ethan exclaims "Well, thank you for watching and don't forget, always look behind you", followed shortly by a brief flash of a disturbing, shadowy figure (featured on the "HONESTLY TERRIFYING" thumbnail) overlapping the screen, as the video comes to a close.

Carpentry may have proven too difficult for Ethan to master. Perhaps assembling IKEA furniture is more his speed. Too bad he lost the instructions.

ah, America. Land of the free(?) Home of the brave(?) Do Mark and Ethan have what it takes to be top tier US citizens?

Fanart is the purest expression of appreciation. It is love distilled. It is light purified. Today, Mark and Ethan express their undying appreciation for each other through the delightful medium of fanart.

We tried our best at haunting the internet. But we should have known that we were no match for the demonic artistic ability of our own fans.

Although we may never be able to travel back to our childhoods, that won't stop us from recreating some of our favorite photos from that innocent time.

Breaking boards of wood is the foundation upon which all forms of Martial Arts are based on. Karate... Tae Kwon Do...Kung Fu... We attempt to master every single discipline in one fell CHOP!

BEWARE ALL WHO ATTEMPT TO WATCH THIS VIDEO! It's a curse or be cursed world in here. Actually though, this video is gross and horrible and upsetting.

Mark and Ethan try and force themselves to cry on command by thinking of personal loss and watching emotional videos. At the end of their segment, Mark asks their audience to post a tutorial of them crying on command under the hashtag #CryusAnnus.

Following up on their idea from the Beer Sauna video, Mark and Ethan use their own urine as a vaporized substance for the home steamer.

Ikea is known for easy-to-follow instructions for simple pieces of furniture that we are gladly able to hah just kidding this is impossible.

Mark and Ethan attempt to imitate the movement of a trotting horse after seeing an online video of Ayla Kirstine doing the same.

Mark and Ethan compete against each other to see whose paper planes can travel the farthest, with Mark coming out as the winner.

Mark and Ethan attempt to portray mythical mermen creatures by putting on large fishtail costumes and swimming in their pool, with the title being a pun of Mark's German surname that means "fish creek/brook".

Mark and Ethan attempt to learn lockpicking. They first start out with practice locks before moving onto security lock boxes. Each box contains one of their phones with a six minute timer on them to see if they can get the locks open before the clock runs down to zero. After trying for six minutes straight, the timer sounds off, much to their dismay. At the end of the video, Ethan jokes about needing to take his phone out with brute force, before taking the box out to their backyard and shooting it with a paintball gun.

Mark and Ethan shave each other with a straight razor. While Mark does a quick and clean shave, Ethan spends several minutes prepping Mark and taunting him with the blade. As Ethan extends the razor, Mark's panicking scream is heard before the scene cuts to black with Helltaker's "BAD END" title card overlapping across the screen, implying that Ethan accidentally killed Mark.

Mark and Ethan attempt to read each other's fortune by using palmistry techniques that they picked up from a hand reading guide. Nearing the end, Mark reaches for Ethan's hand to examine a detail he supposedly overlooked. As he places Ethan's palm into the frame, Mark exclaims "it's a clock", with the Unus Annus timer overlapping across it, before the video comes to a close.

After practicing a variety of techniques involved with tying knots, the two demonstrate their made up ones on Mark after Ethan stated that a single man could trap a fully grown bear with basic rope binding tricks.

The two reenact the totem pole trench cinema trope, where one child, or in this case Ethan, would sit on another's (Mark's) shoulders while wearing a long trench coat to pretend they're a fully grown adult, usually to sneak into an adult-only facility. In this example, Mark and Ethan pretend to sneak into a cinema while trying to fool cardboard cutouts of various celebrities, historical figures and fictional characters that were used in one of their previous sketches. Nearing the end, as this was filmed during the COVID-19 pandemic, Mark exclaims that they've forgotten their face masks before exiting the make-believe cinema, as the video comes to a close.

Mark and Ethan attempt to build a miniature boat using only IKEA furniture parts and cardboard boxes. Upon completion, Ethan names it "USS Engineer Boy Jr." After sending it afloat in their pool, the two later attempt to board the boat, but end up sinking due to their combined weight overwhelming the makeshift vessel. As it's falling apart, Fischbach and Nestor decide to go down with their craft as the video comes to a close.

Ethan jokingly teaches Mark how to properly swim in his pool in a form of a sarcastic educational video, with its visuals being stylized to mimic the appearance of 1990s VHS recordings. In a post-credit scene, a montage of disturbing imagery with distorted sound plays, as the video closes off to wish Mark a happy birthday.

Mark and Ethan test out ten different products made for improving a person's jawline.

Mark and Ethan take turns tasting a variety of flavored soaps to recreate an outdated form of discipline which involved a person, usually an adolescent individual, washing their mouth out with detergent for using, what is considered to be, unacceptable language. This was a very common form of physical punishment in the US from the late 19th to mid 20th century.

Mark and Ethan use a Smithsonian Fingerprint Kit to investigate a make belief crime scene in search for stolen school supplies. Nearing the end of the video, the two inhale a powder that allows them to go back in time and prevent the crime from ever happening. In a post-credit scene, Mark fingerprints Chica's paw and accuses her of theft.

Ethan helps Mark recreate exaggerated versions of his childhood stories.

Mark and Ethan place an Apple Watch into a rock tumbler, alongside a few pebbles, in an attempt to make it more smooth, leaving the machine running supposedly for three days straight.

Mark and Ethan try out various products designed for strengthening gluteal muscles, such as padded underwear and an electric stimulator.

Mark and Ethan make their own paper kite, later named Sisyphus, by stitching it together from two separate ones in an attempt to recreate Benjamin Franklin's kite experiment. Once constructed, Mark has Ethan run around his backyard with the kite in hand, as the added visual effects make the video appear more gloomy to imply the coming of the thunderstorm. The episode ends shortly after with a flash of an electrical surge, implying that Ethan's kite was struck by lightning.

After putting on a candy lingerie, Mark and Ethan compete against each other to see who can eat more of their own two-piece in less than five minutes without taking them off. After five minutes passed, Mark's declared the winner and Ethan is forced to eat Fischbach's candy undergarments, as a form of punishment for losing to him.

Ethan pretends to have invented an app for Apple Watch that turns a person's pet into their younger self. As a demonstration, Ethan shoots a beam of light onto Chica to turn her into a puppy. In actuality, the dog in question is a 9 week old puppy named Bodhi and belongs to Evan, one of Unus Annus' crewmembers. After the introduction, Mark and Ethan declare the #BodhiAnnus challenge for their fans to submit artwork of Bodhi to Unus Annus' social media. The remainder of the video is spent with the two of them and their pets playing alongside Bodhi. vvvvvvvvvv

Today, we conquer a challenge that has been nipping at our heels since the day we began this journey: Pole Dancing

Mark and Ethan use 5 agar plates each to collect bacterial samples from various parts of their body; those being feet, hands, tongue, genitalia and a sample from their cough to be examined at a later date. Three days later, after the bacteria has manifested inside the petri dishes, Nestor and Fischbach examine them under a microscope to see their formation.

Mark and Ethan try various sweet and sour food combinations that normally do not complement each other.

After drinking two large bottles of Doctor Pepper off-brands, Dr. Dynamite and Canada Dry, Mark and Ethan fill up the now empty containers with baking soda and vinegar to make bottle rockets. In the final scene of the video, Mark's rocket is edited with a chroma key technique to appear as if it was leaving the Earth's atmosphere and landing on Mars a few moments later.

Mark and Ethan compete against each other in a made-up egg smashing contest where the goal of the game is to get one's opponent to break the egg in front of them by quickly taking off the plastic cover while both players are simultaneously tapping the top of the lid. Halfway through the the game, the two introduce additional challenges to raise the stakes, including keeping in sync with a metronome phone app that gets progressively faster over time and tapping the lid with their eyes closed. The game eventually ends with Mark winning 5 to 2 against Ethan. As the video comes to a close, Amy suggests for Ethan to cut Mark's hair in one of their future videos, before he quickly exclaims to the editor to cut the video.

The two attempt to bake cookies by using a small batch of cookie dough ice cream. Mark found the final result satisfying, while Ethan saw it as mediocre.

Mark and Ethan bleach their clothes. Before commencing with their task, the two ask their audience to participate as well by bleaching their own clothes and posting the results to Unus Annus' social media under the #BleachusAnnus hashtag.

Mark and Ethan dip Oreo cookies in twelve different condiments to see what they would taste like.

Our dogs ARE the best. Therefore they DESERVE the best. Chica is not spoiled. Henry is not spoiled. Spencer is not spoiled. We are not accepting questions at this time.

Mark and Ethan attempt to assemble a dental prosthesis. The video's presentation derails over time, as they start gluing the prosthetic teeth to stuffed toys and each other's body parts.

Mark and Ethan attempt to free themselves after being blindfolded and restrained to chairs with duct tape. Fischbach manages to free himself in six minutes, while Nestor takes upwards of twelve. The second task sees the two trying to undo two sets of binds around their wrists and ankles. Ethan slides his hands out and unties the rest, while Mark brute forces his way from his restrains.

After applying their facial masks comprised of iron particles and leaving them on for several minutes, Mark and Ethan use a magnet to slowly chip away its texture.

Please... this is a joke. Don't ever ever ever ever do this ever.

Ethan straps various cleaning supplies onto Mark's body in order to turn him into a human mop.

Sound Therapy is the art of tapping into the acoustics of the universe to coax the human body to heal itself. Basically we're yelling into our wounds.

Mark and Ethan try out B'loonies, a brand of bubble making toys from Fischbach's childhood that was discontinued due to its toxic fumes and the potential for harmful chemicals to build up inside the straw, making it dangerous to inhale. After shaping their balloon animals, Mark ignites the two figures to see how flammable the chemicals are, which causes them to catch fire and burst immediately, singeing the end of Fischbach's hair.

Mark and Ethan spend the entire video attempting to teach Chica how to save people from drowning without any success. The only time the two managed to get her to swim was when Ethan carried her inside the pool.

Mark and Ethan each build a bird's wing for one of their arms by attaching fake feathers to a piece of cardboard in a sarcastic attempt to outdo Icarus' mythical flight. Nestor and Fischbach's wings consisted solely of black and white feathers, respectively, to reflect their Unus and Annus personas. Once completed, the two join together and fly out of the Earth's stratosphere directly into the sun, where they're confronted by a flaming angelic figure holding a Subway sandwich and a drink, as the video comes to a close.

The video starts off with Ethan and Mark, portrayed as Unus and Annus, walking towards one another through a semi-arid desert, alternating between each other's slow-paced monologue. Once their paths cross, now exhausted and dehydrated, the two discard their clothes and march towards the barren wasteland in the distance as the video comes to a close.

After taking turns scoring shots on a Basketball court and not knowing who won, Mark and Ethan decide to play one more round where they form a human totem pole, with Mark carrying Ethan on his shoulders to score one final point. As Ethan's left hanging on the hoop, Mark runs off into the distance, celebrating their joint victory.

Mark and Ethan compete against each other in a horseshoe pitching contest. After failing to properly land a single horseshoe on the goal post, the two performed, what they considered to be, a series of manly actions, depicted with a short montage in order to enhance their skills. The video ends with a secondary montage of them successfully pitching horseshoes in an exaggerated manner.

Mark and Ethan observe the night sky from Joshua Tree National Park, California, waiting for a chance to see NEOWISE, a comet visible from Earth only once every 6,800 years. Throughout the video, the two discuss various topics relating to outer space, such as the ever-expanding universe, existence of extraterrestrial life, human advancement and potential colonization of other planets. Near the end of the video, Mark and Ethan gently sing a portion of "SPACE IS COOL" remix.

Mark and Ethan compete against each other to see who can power up their phone first with a hand-cranked electric generator. The loser of the match was required to fully charge their phone using only this method. After some time, Ethan's briefly powers up, but before he could claim victory, Mark jokingly accuses him of cheating and changes the end goal to charging their batteries to 5%. Some time after, Mark's crank breaks off due to his excessive force. Feeling disgruntled, Fischbach replaces his rotating mechanism with a power drill to accelerate its revolution. Although his phone briefly turns on in the background, Mark never notices, as the device overheats from the drill's immense speed and discharges electricity, which breaks his generator.

Mark and Ethan try out spray-on facial hair products.

As a former trumpeter for Ohio's Milford High School marching band, Mark attempts to teach Ethan how to properly play the instrument, with little to no success. Both of their instruments shared a color that's usually associated with their respective channel themes, Mark's being red and Ethan's blue.

Mark and Ethan compete against each other by using playing cards to pierce a paper-made dartboard. After failing several times, the two nail fruits and vegetables onto the board to be used as a softer goalpost. A few tries later, Mark manages to land their first card against a banana, with Ethan jokingly walking up to the board and fastening his onto the same fruit, as the two celebrate their success.

Mark and Ethan grease their floors to compete against each other in an indoor sliding contest, with Mark coming out as the winner.

Mark and Ethan try various methods to match a champagne glass' resonant frequency in order to break it with their voice. After several attempts without any success, Mark slams the glass across the table and pretends as if they had shattered it.

Mark and Ethan upload one final reminder of how many days remain before the channel's inevitable deletion.

Mark and Ethan attempt to drink ten shots of apple cider vinegar, each. Feeling nauseous, Ethan drops out after the first shot, while Mark continues by himself up to his third glass. Feeling overwhelmed by the cider's effects, the two take one final shot before ending the video.

Mark and Ethan play with Wubble bubble ball.

Seeing as all pet grooming shops are closed in their area due to the COVID-19 pandemic, Mark and Ethan decide to comb Chica's coat themselves.

Mark and Ethan play five finger fillet, a game where one person places their spread palm onto a hard surface while thrusting a knife (or any sharp object) back and forth between the gaps of their fingers, progressively increasing their speed on each consecutive turn. The knife game's rulesets are purposely designed with the risk of injury, often attracting thrill seekers. Due to the game's dangerous nature, Mark and Ethan used the handle of a butter knife instead of its blade and wore NoCry's cut resistance gloves as a means of protection. After doing a test run, Mark jokingly pulls out a prop gun and uses it to play the knife game together with Ethan. As the video's about to end, a muzzle flash is seen with stock footage of a blood splatter overlaid across the screen, before the episode cuts to black.

Mark and Ethan browse through Unus Annus' social media in search for community video ideas for them to judge as either "Worthy" or "Not worthy". At this point, some ideas were already done, while others were repurposed for a later date.

Mark and Ethan empty out various combinations of aerosol paints into a water container in order to hydro dip various items from their past Unus Annus skits, such as sex toys, a bike helmet, dustpan, a paddle, a prop of a human skull, and a plastic baby doll.

Mark and Ethan use a high-powered laser to pop corn kernels. This idea was suggested by one of their viewers in "Judging Your Terrible Unus Annus Ideas". After several failed attempts, the two manage to pop a corn seed, each using a hair straightener.

Mark attempts to help Ethan "go through puberty" by employing several pseudoscientific methods.

Mark and Ethan compare each other's hand strength using grippers. The person that performed worse, this being Mark, had to be the other's butler for the remainder of the day.

Mark's mother gives him and Ethan sarcastic tips about self-defense.

Ethan covers Mark's body with gold body paint and poses him as a statue to mimic one of the Seven Wonders of the Ancient World.

Mark and Ethan play a variety of children's games inside an empty walk-in closet that's entirely devoid of light.

Mark and Ethan manducate on dog's chewing rope to test the strength of their jaws. Failing to make any progress, the two glue leftover fake teeth from their previous sketch onto a knife and start cutting through the rope.

Mark and Ethan attempt to pull off TikTok's Koala challenge, requiring for one out of two people facing each other to climb up another's shoulders, crawl over their back and reemerge between the knees, back into their grip. After completing the challenge, Mark asks the Editor to fuse the two in post-production and spin them in unison across the universe, as the video comes to a close on the low quality, digitally imposed cut-outs of Mark and Ethan spiraling into the sun.

Mark and Ethan push themselves to the limit yet again as they challenge each other to consume 1 gallon (3.8 liters) of pure strawberry flavored jello.

Mark and Ethan, along with Ethan's dog Spencer, drive to the future location of Camp Unus Annus. Traveling to their destination, Mark uses a variety of animal posters, including squirrels, deer, snakes, bats and bears, to educate Ethan on the many dangers of wildlife that lurk in the woods, as they eat nothing but pickles.

Mark, Ethan and Amy, as the camera operator, travel to the woods in the first installment of Camp Unus Annus where they try to set up a camp via their so-called buddy system, requiring them to work together to pitch a tent while Ethan uses his earbuds to drown out background noise and Mark blinds himself by tying a piece of cloth over his eyes. Once the setup's finished, a supposed bear that's been stalking the grounds from the beginning makes its presence known and lunges at them as the video abruptly ends with a splash of blood across the screen.

In the second installment of Camp Unus Annus, Mark and Ethan teach their viewers the importance of the buddy system once again by showing them how to properly rescue a cat that is stuck in a tree using an inflatable Fuzzy Wubble Cat toy for their demonstration. Once Ethan retrieves the toy and throws it to the ground, Mark jumps off and walks away, leaving Ethan stranded at the top of the tree.

Waking up in the middle of the night to a supposed grizzly attack, Mark and Ethan decide to teach their audience how to defend themselves against bears. Later on, the two decide to roll their tent across the field to escape. After which, Ethan tears through the fabric and exits their portable shelter, leaving Mark behind as the tent slowly collapses onto him.

Mark and Ethan teach their viewers how to dig a grave and properly dispose of a recently deceased individual.

Mark and Ethan participate in a series of group-oriented activities, such as trust fall, human pyramid, tug of war, three-legged race and sack race. Later on they make up their own variations of various camp games, including three-legged tug of war, sack tug of war, egg balance tug of war and three legged egg balance.

Mark and Ethan sit down in front of a fireplace where they attempt to teach their viewers unorthodox ways of starting a fire, while at the same time strongly advising against it. In the second half of the video, Mark pulls out a fixed blade knife while ominously staring at Ethan who's monologuing to himself about the consequences of taking someone's life. While Mark slowly approaches Ethan, Nestor's Unus persona walks up to the house and presses himself against the front window. Fischbach then proceeds to swing his blade at Ethan, as the scene briefly cuts to black before returning to a shot of the lit fireplace, with the two roasting marshmallows as if nothing happened.

In the middle of the night, Mark forces Ethan to engage in his outdoor escape room by guiding him through the woods with a pair of walkie-talkies. While looking over various animal posters from their preceding video to Camp Unus Annus, Ethan discovers one additional image titled "Neanderthalensis Marconius," a snapshot of nude Mark crawling out of his pool from one of their previous skits. Turning his attention towards the woods, he spots the aforementioned individual running towards him. Before he could react, the feed cuts off with Ethan's scream being the last thing heard in the video.

Continuing from the previous episode, Mark, now dubbed Neanderthalensis Marconius or HeeHoo after supposedly devolving into a primitive, is loose in the wilderness. Three months later, Ethan comes back with a film crew to make a documentary about Mark's condition, while attempting to locate the individual.

On the final installment of Camp Unus Annus, Mark and Ethan discuss various subjects centered around their joint channel.

Mark gives Ethan a hot stone massage using a stick of butter instead of oils.

After playing with and mixing a cocktail of scented oils and ingredients into a liquid air freshener, Mark, Ethan and Amy pass out from the scented chemicals.

Physics is pretty straightforward on this one. Energy in = Chicken out. Conservation of mass or something like that... either way we're eatin' good tonight!

Mark and Ethan get their stools analyzed with Viome's Gut Intelligence test.

What does it truly mean to be in a marching band? Today, Ethan will find out.

Mark and Ethan taste test their homemade wine from "DIY Wine".

Ethan is not very good at math. To prove just how not-good he is we decided to take a 4th Grade Times Tables Math test!

Mark and Ethan test out a variety of unconventional products as snow cone toppings.

Mark and Ethan attempt pottery, one of Amy's skills, without her input. Mark makes an ashtray, while Ethan molds a cup.

Mark and Ethan attach electrodes to a potted plant in an attempt to see if it can feel any pain.

Mark teaches Ethan how to play shot put, a track and field event that involves pushing a heavy ball away from oneself as far as possible. However, instead of the usual spherical ball, the two use a 16lbs (7.25 kg) rock. As Mark hurls the last stone towards the camera, the video ends with a cut to black, implying that he struck Amy in the head.

It’s 2020! Why not get bored and pierce our ears???

Mark and Ethan taste a variety of dog food

Following up from their previous SCP-related video, Mark and Ethan use a number of props from Unus Annus' past sketches to construct a model of Amy as an SCP creature. After finishing their shoot and leaving the set, Amy's SCP model seemingly becomes sentient and begins to stalk the house's residents.

Mark and Ethan use beyblades, a line of spinning top toys, to play nutball, a made-up game where the objective is to send an object tumbling into the opponent's groin. After several attempts to get the tops working, with Ethan's constantly falling apart, the two manage to simultaneously hit each other.

Mark and Ethan mix and match hamburgers from various fast-food chains to make their ideal patty, later dubbed the Unus Annus Sandwich.

Mark and Ethan use a SodaStream to carbonate various liquids and make a new flavored soda.

Following Evan's suggestion from the previous episode, Mark and Ethan use a SodaStream to brew and drink their carbonated urine.

Mark and Ethan play around with Uncle Milton Star Wars Science kit in a joking attempt to utilize the Force, a metaphysical power from the Star Wars franchise capable of attracting and repelling physical bodies at the user's will.

As the title suggests, Mark and Ethan play a game of soccer with a brick instead of a traditional spherical football. Mark names his one-man team Bricksfield Masons and Ethan Treetown Trees, as he happened to be standing under one. The video closes off with Mark attempting to headbutt the brick, before cutting to black with a blood splatter overlapping the end card, implying that Mark cracked his forehead.

Mark and Ethan jokingly attempt to make holy water by consulting a wikiHow guide.

Mark and Ethan jokingly attempt to make holy water by consulting a wikiHow guide.

After receiving a Banana Surprise toy from Amy, Mark and Ethan buy several bananas to fill them up with toppings using the aforementioned device.

Obsessing over his loss at the grip strength test, Mark demonically monologues to himself in a poorly lit room that's plastered with photographs of Ethan's hand grasping his grippers. After some contemplation, Mark proclaims that Nestor's grip was loose, which allowed him to claim the victory he believes was rightfully his.

Mark and Ethan rummage through a room filled with items and contemplate what type of video should they make next. After thoroughly exploring the room, Mark decides to jump off the roof and into his pool, with the following scene edited in such a manner to make it appear as if Fischbach actually did it. Due to his fall being obscured by the rough cut, Mark attempts the jump one more time, as Amy gets distracted by Ethan's drawing and fails to capture his supposed descend, much to his dismay.

Mark and Ethan attempt to make the so-called unholy water by using the opposite ingredients from their holy water video.

Ah butter... the chicken of the bread. Peasant's Gold! The froth from which deliciousness pours. We discover the long forgotten mythical process by which that golden goodness is churned.

As an ex-gymnast with almost ten years of experience, Ethan attempts to teach Mark various gymnastic skills. After attempting to do a back handspring, Mark trips and falls backwards, as the video, accompanied by cracking sound effects, cuts to black, implying that Mark broke his back.

Mark and Ethan compete against each other to see who can eat their ice cream cake faster in thirty minutes or less, with the loser being forced to "walk the plank." After failing to scarf down the two sweets, both of them decide to call it quits and measure each of their cake's weight to see who had eaten the most. With Mark declared the winner, Ethan is forced to walk the plank in a short animation of a painting with their faces digitally inserted onto the two characters.

As a former high school wrestler, Mark attempts to teach Ethan basic wrestling moves.

Mark attempts to open Ethan's Starbucks-themed container that's been sealed for over a year. After struggling for several minutes, Mark manages to break open the lid, only to find out that there's nothing in it, despite Ethan's previous claims.

Mark and Ethan take up Alex Tima's challenge and try out Paqui One Chip Challenge chili pepper tortilla chip.

Mark and Ethan initially attempt to catapult eggs from a ball launcher, before settling on a toss game, as the eggs would get stuck inside the machine. After breaking all of their eggs, the two use a solid ball instead. Mark later comes up with an idea to tape a bread knife onto the end of the ball and see which one of them can make the object land on the knife side, similarly to a game of lawn darts. Following his win, Mark exclaims that he can now kill Ethan, as he proceeds to chase Nestor around the pool with a broken bread knife.

Mark and Ethan do 1,000 high fives with each other to prove their friendship.

Mark and Ethan bob for apples in a water container filled with Thick-It Water and Xanthan gum jello powder while being timed.

Mark and Ethan practice aerial gymnastics with Vixen DeVille, with Mark ending up breaking his nose against the aerial lyra for a second time in a single week.

Mark and Ethan learn how to milk a goat at Gilchrist Farm and later play with piglets.

Mark and Ethan practice regular and mounted archery at Gilchrist Farm.

Mark and Ethan play life-sized version of minesweeper, with the player using a metal detector to locate metal arrow heads, that act as mines, buried beneath Mark's lawn. For each missed, the game master will strike the player with a dodgeball.

Mark and Ethan search separately for a safety pin with its needle exposed in a haystack, each of them being colored in accordance with their Unus Annus personas; black for Ethan and white for Mark. Sometime later, Mark finds the white pin and declares himself the winner, while Ethan gives up after failing to find his for several minutes. In a jump cut, the two are seen arguing over which one found Ethan's black pin off-screen.

Mark and Ethan attempt to copy each other's drawings in complete darkness with one person drawing on another's back while the other attempts to replicate it by feeling the movement of the pen.

Mark and Ethan use a vacuum pump to draw out all the oxygen and seal each other inside a trash bag.

Mark and Ethan go for a late night swim in Fischbach's swimming pool where he will attempt to conquer his fear of swimming at night while Ethan taunts him as the Gongoozler, a made-up monstrous sea creature that stalks its prey from below the surface. In a post-credit scene, Ethan, portraying the aforementioned creature, swims beneath and pulls Mark into the water moments before the video comes to an end.

Mark and Ethan practice gymnastics on an aerial hammock.

Mark and Ethan try on every Grinch costume Amy could find on eBay to reenact scenes from the 2000 Christmas film How the Grinch Stole Christmas as a means of celebrating an early 2020 Christmas that they are bound to miss out on due to the channel's deletion date being in November of that year. After trying out every available costume, the video ends with the two collapsing onto the ground from a supposed lack of oxygen caused by their tight masks.

Mark and Ethan taste test and rate several types of pumpkins.

Mark and Ethan compete against each other in a jumping contest in other to improve their athletic capabilities.

Mark and Ethan bob for a variety of foods that are submerged inside a plastic container while blindfolded. Once obtaining the food item, the participant is required to eat it and guess what it's suppose to be, with each correct answer earning them a random amount of points.

Mark and Ethan make an entire unedited video of them waxing their nostrils.

In preparation for the upcoming Halloween, Mark's mother shares her ghost stories and Korean folktales with Ethan and her son.

In a reference to Mark's 2013 Cinnamon Challenge video, Fischbach and Nestor partake in a similar challenge where they consume raw pumpkin spice.

On an alluring autumn night, Mark and Ethan decide to build their own scarecrow using hay, a yellow pumpkin and some Unus Annus merchandise. They later come up with a name for it by taking turns and picking random letters till they settle on Guppti Tamberooly Jooortelsk.

Ethan uses a pressure washer to hose down Mark and a number of items in Fischbach's backyard.

Mark and Ethan sail out on the Duchess off the coast of Marina del Rey, California where Mark must face his fear of open water and swim in the Pacific ocean.

Following the events from their previous episode, while still on the Duchess, Mark and Ethan decide to compete against each other and see who can catch the most amount of fish, which tallies up to 19 mackerels by the end of the video.

Mark and Ethan, having knowledge of well known internet cryptids, compete against each other while portraying the aforementioned creatures in a series of trials to see who can become a new cryptid.

In a similar style to Phasmophobia, Mark and Ethan explore an abandoned house using pseudoscientific tools to contact ghosts. As the two get separated, the coms start picking up each other's voices asking them to hurt one other. Moments later, Mark is ambushed by what appears to be Ethan who drags his unconscious body into the darkness. Meanwhile, the real Ethan spots a figure through an infrared camera sprinting towards him, before the video cuts to black.

In preparation for Halloween, Mark and Ethan carve some pumpkins to make jack-o'-lanterns, with the added challenge of taping knives and additional utensils to their fingers. After etching their pumpkins, Mark and Ethan try to help each other remove their taped tools, before the video cuts to a stock footage blood splatter, implying that the two accidentally stabbed one another.

Mark and Ethan brew and lie in a bath filled with fake blood that's made out of Maizena corn starch, Karo dark and light corn syrups, Kroger chocolate syrup and assorted food colors, Folgers classic roast instant coffee, Grandma's Molasses, Betty Crocker gel food color, cherry and chocolate Jell-O and ketchup.

Mark and Ethan compete against each other in a costume contest in scary, sexy, sad, cursed, offensive, funny, and cute categories. As Mark is declared the winner, Ethan is forced to stay behind by himself at the Halloween-themed house.

Ethan, using pieces of Chica and Spencer's shed coat, glues their dogs' fur onto Mark's body to have him resemble a werewolf.

In retaliation for his stunt at the camp, Ethan kidnaps and leaves Mark inside an abandoned house for him to navigate through and solve Nestor's tasks by picking out the right items that correspond with his questions. Each right solution awarded Mark with a cardboard cutout of a word. Reaching the end, Fischbach assembles all the pieces to form a full sentence that reads "Look even further beyond yourself and speak the truth. Ethan is my equal." After reading it out loud, Ethan appears around the corner and lunges at Mark, as the video comes to an end.

Following up from the ending of the last episode, the Unus Annus crew is heard laughing inside the abandoned house, wrapping up their shoot for the night. As Ethan's washing up, his walkie-talkie begins to pick up a signal from what initially appears to be Mark exclaiming "It's time." Moments later, the lights go out in the entire building. As Mark and Ethan etch closer to one another in complete darkness, they begin to hear their own voices addressing them through the coms, stating that their time is up. Despite the two pleading for another chance to better themselves, the disembodied voices note the end is upon them and that they have to accept the "truth."

Mark and Ethan invite their audience to watch the final Unus Annus YouTube stream, starting on Friday, November 13, 2020, at 12pm Pacific, as a means of commemorating and celebrating their time spent together over the past year, where at the end of the broadcast, they were to delete their channel.

Mark and Ethan share their final Unus Annus meal with each other, all of which were picked by Amy in style of their previous episodes.

Mark and Ethan share their honest thoughts about each other and on their year-long collaborative work.

Mark and Ethan recreate all of their past videos, each of them being presented in one short, exaggerated scene.

Mark and Ethan discuss a number of Unus Annus video ideas that never came to fruition. Most of these existed merely as concepts and were seen as either being too obscene or too difficult to implement, while a handful were scrapped due to the COVID-19 pandemic.

Mark and Ethan cut a few dozen onions throughout the entirety of the video.

Mark and Ethan read roasts sent in by their viewers over social media under the hashtag #RoastusAnnus.

It's all come down to this.... our final fitness challenge.

As a way of commemorating the channel's final days, Mark and Ethan call up most of the people they've worked with over the past year using an old fashioned landline made out of cardboard (the actual mobile phone was placed inside the prop).

As a follow up to the original video, Mark and Ethan cook yet again using sex toys and an automated sex machine to feed each other.

Mark spends seven minutes pampering Ethan with relaxing music, massages, scented oils and sustenance, while Nestor has Fischbach listen to Doom's "BFG Division" soundtrack and stuffs his face with hot dogs, Oreo cookies and dog treats. Both of them were sitting inside their own portable sauna.

Mark and Ethan simulate a children's sleepover before their final Unus Annus livestream.

This is it. We will be deleting this channel live on stream. Join us for our final moments.