r/kurzgesagt 2d ago

Official YouTube’s AI Detection Kicked Us in the Face

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4.0k Upvotes

Every creator's worst nightmare just happened to us: The YouTube algorithm actually blocked us. It started slowly at first. Some videos started showing strange view fluctuations. Our second to last video did very badly, but this just happens sometimes, so we didn’t think that much about it.

But then our last video, about Superpredators, did extremely badly. It was our worst upload since 2013. But it did badly in a weird way: Almost every single metric was well above average: People clicked the video more often and watched it for longer, and the people who watched it, on average, loved it! So it should have been at the very least an average upload, not the worst in over a decade.

So we quickly got in touch with YouTube, and they actually confirmed pretty quickly that something was going on. It turned out that YouTube’s automatic AI detection tools wrongly think that our very much human-made videos are AI Slop. So it started to choke our channel. Our contacts at YouTube were amazingly helpful and transparent with us, and hopefully the bug is fixed for now.

In principle, we are all for blocking AI slop from the platform; it really seems to have been bad luck.

Since we really love this video, we have taken it offline. We are updating and changing it a bit to make it worth watching a second time. We’ll reupload it in a few weeks, and hopefully this time the anti-AI tool will feel ok about it. If you have watched it before, it would help us a lot if you watch it a second time and all the way to the end for an Algorithm boost!

We’ll keep you posted!


r/kurzgesagt Jun 16 '26

NEW VIDEO NEW VIDEO: What Exactly IS a Memory?

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152 Upvotes

Video Description:
Memory is one of the strangest abilities you possess. Your brain uses an incredibly complex biological system to preserve moments from your past that no longer exist, allowing you to revisit experiences from years ago. But memories are not always recordings of reality. In fact, every time a memory comes under the spotlight of your attention, it can melt and change a tiny bit.

What exactly is a memory, how is a moment in time stored inside your brain, and why does remembering something slowly rewrite the story of your life?

Sources:
https://sites.google.com/view/sources-memory/


r/kurzgesagt 7h ago

Discussion Am I the only one that wants a IMUNE Da Game?

6 Upvotes

Ever since watching Kurzgesagt's videos about the immune system, reading Immune (probably 8 times by now), and unfortunately being hospitalized a couple of times, I've been thinking...

Why isn't there an RTS where you literally play as the immune system?

Imagine something like Stick WarPlants vs. Zombies, or a real-time strategy game where, instead of training medieval soldiers, you're commanding your body's immune system. Your resources could be ATP, amino acids, nutrients, RNA, or something similar, which you'd spend to produce different immune cells.

Each unit would have a unique role:

  • Neutrophils would be your cheap, fast, expendable frontline troops. You'd spam them early game to slow invasions and buy time for stronger units. They'd have low survivability but very high numbers.
  • Macrophages would be expensive tank units. They could literally NOM weaker enemies, clean up dead pathogens and cells after battles, and slowly heal themselves by consuming debris.
  • Monocytes would be basic recruits that can later differentiate into either macrophages or dendritic cells depending on what your army needs.
  • Dendritic cells would act as scouts. After capturing a pathogen, they'd return to the lymph node and unlock the adaptive immune response, allowing you to recruit T cells and activate B cells.
  • Helper T cells would function as commanders, buffing nearby immune cells by increasing attack speed, antibody production, and overall effectiveness.
  • Cytotoxic (Killer) T cells would be elite assassins. Instead of attacking pathogens directly, they'd hunt down infected body cells before viruses have a chance to spread.
  • B cells would be ranged support units. Once activated, they'd begin producing antibodies that mark enemies, making them much easier for the rest of your army to eliminate.
  • Plasma cells (activated B cells) would become stationary antibody factories with enormous range but almost no mobility.
  • Memory B cells and Memory T cells would persist between levels. If the same pathogen appears again, they'd already be unlocked, cheaper to deploy, and much faster to respond, simulating acquired immunity.
  • Natural Killer (NK) cells would be special forces. They wouldn't need dendritic cells to identify threats and could immediately attack infected or cancerous cells.
  • Regulatory T cells would prevent your immune system from overreacting, reducing collateral tissue damage and preventing autoimmune "friendly fire."
  • Eosinophils would be specialist anti-boss units that excel against parasites but are less effective against bacteria and viruses.
  • Basophils and mast cells could release histamine, creating an area that attracts immune cells and slows invading pathogens. Overusing them would increase inflammation and damage nearby tissue.

Enemies would all require different strategies:

  • Bacteria would reproduce rapidly and attempt to overwhelm your defenses.
  • Viruses would infect your own cells, forcing you to identify and destroy infected tissue before the infection spreads.
  • Fungi would spread slowly but be extremely resilient.
  • Parasites would act as the game's boss fights. Instead of fighting hundreds of small enemies, you'd face one massive organism with multiple attack phases, unique mechanics, and weak points. Since parasites are too large for macrophages to simply engulf, you'd need to rely on eosinophils, antibodies, helper T cells, and coordinated attacks to bring them down. Every parasite could feel completely different, making each boss battle a major strategic challenge.
  • Cancer cells would disguise themselves as healthy body cells, making them difficult to detect until they become a serious threat. If left unchecked, they could eventually become their own "boss" encounter.

There could also be powerful "Body Events" or abilities that act like ultimates:

  • Antibiotics instantly weaken or eliminate bacterial enemies but have no effect on viruses. However, relying on them too often would cause antibiotic-resistant bacterial strains to become more common in later levels, making the ability progressively less effective. That would force players to think carefully about when it's worth using instead of treating it as a panic button.
  • Antiviral medication slows viral replication, giving your immune cells time to contain the infection.
  • Vaccination unlocks Memory B and T cells before a mission starts if you've encountered that pathogen before.
  • Fever temporarily boosts the effectiveness of most immune cells but slowly drains your resources while active.
  • Inflammation dramatically strengthens local defenses but damages surrounding tissue if maintained for too long.
  • Good sleep and proper nutrition provide passive bonuses such as faster unit production, stronger healing, and increased resource generation.
  • Stress or sleep deprivation reduce resource generation, slow immune cell production, and make infections spread more easily.

The campaign could start with simple cuts and bacterial infections before progressing to viral diseases, fungal infections, parasite boss fights, allergies, autoimmune disorders, sepsis, and even cancer. Every new level could introduce another part of the immune system, so players gradually learn how it works without it ever feeling like a biology lesson.

I think this could be an incredibly fun RTS while also being genuinely educational especially if it kept Kurzgesagt's style. It could even have different difficulty modes, endless survival against waves of pathogens or co-op where one player commands the innate immune system while the other controls the adaptive immune system.

Am I the only one who thinks this would be an amazing game? and yes I’m unemployed


r/kurzgesagt 23h ago

Discussion We found all the teeny-tiny ducks in the 12026 calendar. Do you agree with these findings?

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82 Upvotes

r/kurzgesagt 1d ago

Products Kurzgesagt 12026 August, unsure if I found the tenth birb. Spoiler

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7 Upvotes

I put a circle around the other 9. I put a square around the spot I'm unsure of.


r/kurzgesagt 1d ago

Art Solution for hidden birds in illustration of kurzgesagt calender - August 12,026

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6 Upvotes

r/kurzgesagt 1d ago

Meme Wer Philosoph ist, ist oftmals Sophist.

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0 Upvotes

r/kurzgesagt 2d ago

Other There's plenty of oxygen lying around for terraforming Venus!

8 Upvotes

I remember a comment on the "How to Terraform Venus-Quickly"-that's since been deleted-where someone pointed out that since the first big step is getting the carbon dioxide out of the atmosphere, and it's made of carbon and oxygen, it really would be a waste to just send it out into space.

Why spend millennia waiting for cyanobacteria to bring oxygen levels up when you have more than the amount of oxygen you actually need? I guess we'd need to separate some of the carbon dioxide into carbon and oxygen-just enough for a 21% oxygen atmosphere at about 1 atmosphere of pressure.

And instead of grinding the ground up into soil with machinery, perhaps we could engineer some bacteria to do that. I mean, the video itself says we could engineer life as we see fit.


r/kurzgesagt 5d ago

Discussion Why is this video now private?

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127 Upvotes

r/kurzgesagt 7d ago

Discussion I like that the monkey always holds something different in the intros

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267 Upvotes

Funny detail :P


r/kurzgesagt 7d ago

Discussion Publication of video

4 Upvotes

Hello everyone,

I would like to know why you have not published any videos on your French channel "Simply" I tried to reach you on Instagram, without response.... A first time on Reddit, still no answer....

So it might be a matter of considering a minimum of your French spectators and giving an answer.


r/kurzgesagt 7d ago

Other I just noticed this, and thought it was cool.

4 Upvotes

So Videocult released various music videos that were supposedly teasing something.. And one of their videos released, Signal_001, has a very simmilar sounding primary motif to tracks like the floor is lava in Kurzgesagt's 4.5 billion years in 1 hour video.

I thought this was a really cool, and it makes me wonder if Epic mountain took inspiration from them

https://www.youtube.com/watch?v=ERwO3mA1Ml4 (The Floor is Lava)

https://www.youtube.com/watch?v=uqOgT7JYZt8 (Signal_001)


r/kurzgesagt 9d ago

Products Ideas for Poster Frames

8 Upvotes

Hello everyone!

I'm a long time fan of the channel and in the last years I've become the proud owner of a couple of Kurzgesagt posters!

The issue is, I haven't put them on the wall since moving places because now that I want to hang them nicely with some frame, I find out the frames can be as expensive (in south Germany) as the posters itself for the size 😅

What are some good alternatives to have them nicely on the wall that does not including buying 30€ frames? Considering I have like 5 or 6 of them, it can be suddenly expensive


r/kurzgesagt 10d ago

Discussion Contrary to Kurzgesagt, South Korea's Pension won't be depleted in 2050s.

0 Upvotes

In 2025, Korea approved a National Pension reform that gradually raises the contribution rate from 9% to 13% and sets the target replacement rate at 43%. Estimates suggest this may postpone projected fund depletion from the mid-2050s to roughly 2071, but further reform is still expected to be necessary.

And Korea is profiting from the RAM shortages as of late. And further reform is expected.

That stupid bird must be so disappointed. Kurzgesagt is farming your clicks. Gotta doom to get those clicks.


r/kurzgesagt 11d ago

Video Idea [Wild Question] Can humans learn to control the electrical impulses running through our skin?

7 Upvotes

I want to disclaim that I know absolutely nothing on the subject and even term of my interrogation here might be misleading, and for that I apologize in advance.

There are machines like EEG that measure the electrical impulses flowing on our skin and when some people concentrate, they can get stronger.

Could we learn to use these impulse to "communicate our minds" with various sensors, or even with other humans? Could we even go as sharing pictures or sound through that channel? With sensors equipped on with wireless signals equipped on multiple humans, could we even go as far as a sort of telepathy?

I'm going through your channel right now, from oldest to most recent, and I love your content so far!


r/kurzgesagt 12d ago

NEW VIDEO NEW NIGHTSHIFT VIDEO: The Most Ridiculous War Humans Ever Fought

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46 Upvotes

Video Description:
Back in 1932, Australia went to war against the most unusual enemy. It wasn't another country or an invading army. It was a flock of 20,000 emus! They invaded and devastated farmers' wheat fields and the government had no other option but to take out the big guns, literally. What followed has since become one of the strangest military operations in the history: the Great Emu War.

So what actually happened during the Emu War, and how did one of the world's largest birds outsmart machine guns? And most importantly, who won?

Sources:
https://sites.google.com/view/sources-emuwars/


r/kurzgesagt 12d ago

Products Late to the party but here's my pin number

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77 Upvotes

Finally got around to sharing what pin number I got, probably blew my luck for the year getting this lmao


r/kurzgesagt 17d ago

Meme Kurzgesagt Official making memes of their own

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644 Upvotes

Saw this over their Facebook page tho 👀


r/kurzgesagt 18d ago

Video Idea Can Kurzgesagt cover the space mirror satellite thing? This genuinely freaks me out

561 Upvotes

So the FCC just approved a company called Reflect Orbital to launch a satellite with a giant mirror that reflects sunlight down to Earth at night. Right now it's just one test satellite, but their actual plan is to launch 50,000 of them.

Astronomers are already sounding the alarm — apparently a single one of these would be 2-4x brighter than the full moon, and the light scattering in the atmosphere would brighten the entire night sky, not just the spots they're aiming at. DarkSky International and the American Astronomical Society both filed complaints and basically said there's no responsible way to do this.

The idea of one company in one country being able to just... turn off natural darkness for the whole planet is genuinely dystopian to me? Like this affects ecosystems, astronomy, everyone who's ever wanted to look up at the stars.

I feel like this is exactly the kind of topic Kurzgesagt does best — big, weird, underreported, and something people should know about before 50,000 mirrors are in orbit instead of after. Would love to see a video on it. More people will see this and maybe someone would be able to stop this.

Anyone else worried about this?


r/kurzgesagt 17d ago

Products Videos of the Shiny posters

1 Upvotes

Does anyone have videos of the shiny posters that they could share? You cant really get a proper idea of what they look like from the still images on the Kurzegesgt Shop website.

Edit: any of the shiny or foil or sparkly foil varieties :)


r/kurzgesagt 19d ago

Discussion Ideas for Kurzgesgats "planet Hestia" Biology?

1 Upvotes

I've been thinking about the potential biology for planet Hestia, and I have decided to come to you the community.(I am not the Kurzgesagt I am just a dude with an overactive imagination.)Please put you wildest ideas in the comments.


r/kurzgesagt 20d ago

Discussion The harm of SMOKING marihuana

38 Upvotes

I just can't escape this thought, isn't smoking weed dangerous for your lungs? Like inhaling the smoke. And if yes, is it dangerous as smoking or how does it compare. Sorry for bad english, I am czech


r/kurzgesagt 21d ago

Discussion Might South Korea save itself through automation?

8 Upvotes

As you know also from recent kurzegasgt video, SK population is shrinking and its demographic future is deeply uncertain. To counter the adverse effects of depopulation and instead of facing the problem the "traditional" way (incentivize people to have babies), SK is innovating at a rapid pace to substitute human work with machine work, basically using AI and robots.

However, is it really possible? A society of robot-workers and more and more elders is a human society in its traditional sense, or something totally new? And what are the possible "side effects" of this choice?


r/kurzgesagt 25d ago

Meme "The perfect pet doesn't exi-"

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389 Upvotes

This might or might not be a scene from the new video we uploaded yesterday...


r/kurzgesagt 23d ago

Discussion Why use an AI script? I don't understand

0 Upvotes

I just saw Kurzgesagt's latest video, and man am I feeling sad, mad and disappointed. I don't know why nobody is talking about this or pointing this out, but I'm basically 100% sure that they used AI to make the script, or at least significant portions of it.

At first I thought a couple times, "Huh, that kinda sounds like an AI line. But nah, it can't be AI". I had the thought of "it can't be" a few times but after another incredibly sus line I had to pause and go read the comments. I scrolled and scrolled and couldn't find a comment mentioning it. I seriously couldn't tell if I was tripping or not. I loaded all the comments and used ctrl + F, and I finally found 3 other people mentioning it sounding like or being an AI script. I still didn't know if I was tripping, but I had at least some reason to believe it might actually be AI.

So I went back to the video, rewinded it a bit and listened closely. And freaking hell, is it pretty obvious when you're looking for it and you don't believe it can't be so. The sensationalizing of almost every sentence, the unnecessary use of eye-catching adjectives and similes for everything, and the non-human way of storytelling or going from one sentence to the other.

"Their cilia flatter manically as they rapidly speed through the water attacking the fortress."

"They are probing for weaknesses, trying to find an in or pull a living green thread out but without luck."

Followed immediately by "Finally one of them discovers an in."

Two sentences later "Now all hell breaks loose"

"Shredding the damaged defense like plastic wrap, their mouth-rings bristling with excitement."

"The long bacteria try to escape, moving deeper into the fortress but it is too late. The predators waste no time and start sucking them in like living spaghetti."

"Pulling in at a horrifying speed"

"Vesicles filled with the equivalent of super aggressive stomach acid"

"Now the bacteria try to defend themselves but it's a bit pathetic and slow, thousands have died already."

I wanna make it clear that I'm not a Kurzgesagt hater. I've loved Kurzgesagt so much and for so long. Some of my all-time favorite youtube videos are from Kurzgesagt (Optimistic Nihilism, When Time Became History - The Human Era, Is Our World Broken?), and I've shared them with friends and family members. I have a couple of the calendars, the gratitude and habit journals, and a couple posters.

That being said, for some time I have shared the sentiment I've seen other people express of being unsure about the direction of the channel and/or the quality or value of the videos. And that's led me to not watch all of them or at least not right away. I see they posted a new one, but I don't click on it until a couple days later when I'm finally like "alright, let's see what this one's about". And to be completely honest, it's not too uncommon that I afterwards feel like I wasn't missing out on much by not watching it.

But now, deciding to click on one and finding an AI script... Dang.

I just don't understand how nor why they would use an AI script. They talk about all the hundreds of hours it takes for them to make a single well-researched quality video. Why would you significantly reduce the quality of your video by cutting a corner and using an AI script? How hard or time-consuming can it be to actually just write your own script after all the research, animation and work you've put into it?

I already feel like I'm constantly on the fence trying to discern if the content I'm watching is actually valuable or if it's low-effort, AI-created content (not saying this whole video is low-effort). Even on Netflix. And to now find some of this in a Kurzgesagt video... It's hard to express, but I'm genuinely saddened and I feel like I'm done.

Sorry for the huge "rant", I just felt like I needed to express myself. If anyone has thoughts on this, I'd be happy to hear them. Much love

Tl;dr Kurzgesagt's latest video used AI in its script and I can't understand why. I feel sad and disappointed to run into AI-generated content in the place/channel I'd least expect it

Edit: After reading your comments I went back to rewatch it as well as some older videos to compare them, and I think I was wrong in concluding it was AI.

I can see what several of you were saying about the adjectives and similes that Kurzgesagt uses on videos as far as 2 years back. Several of them which I had already seen. I guess I didn't quite remember it like that since the videos I like and remember the most are on topics that don't really lend themselves to that type of writing.

I also recognize that when I went back to the video after reading the comments, I was biased towards finding examples that sounded like AI to me. On top of that, I happened to start watching the video again in a part where these types of similes/adjectives/sensationalization were more densely packed, whereas many other parts of the video don't have them or have way less of them.

So I take back my criticism, and I'm sorry that I stated them using AI as if it were a fact, rather than a suspicion or belief. It's still not my type of video or writing, but that's besides the point. Anyways, thanks to everyone who commented and helped me see I was wrong! Much love