how youtube shorts and instagram reels mess with your brain - By Sourav Mishra (@souravvmishra)
science says short-form videos are changing how we focus. let's talk about the algorithms behind shorts and reels.
okeyy, so let's talk about short-form videos. shorts, reels, tiktok—they are everywhere. and science is finally showing what they do to our brains.
here is what the research and the platforms are actually telling us.
what the science says
a 2024 study from zhejiang university scanned people's brains while they watched a ton of short-form videos. the results are honestly pretty scary:
- weaker brain activity: people glued to shorts had less activity in their prefrontal cortex when doing hard tasks. that's the part of the brain for planning and self-control.
- lower self-control: the more you watch, the worse your self-control gets. it's scientifically linked.
- procrastination: heavy users also put off studying a lot more.
basically, it's not that you get dumb all the time. it's just that when you really need to focus, your brain struggles to do it.
the "tiktok-ification" of everything
steve chen, a youtube co-founder, warned us about this. if we only consume 15-second clips, we train our brains for quick hits, not deep focus.
kids and adults growing up on this stuff might find it super hard to watch a long video or read a book later on. it makes sense—if you optimize for instant rewards, you lose your attention span.
how the apps trap you
these algorithms aren't evil, but they just want one thing: to keep you scrolling.
- completion rate: if you finish a 15-second reel, the app thinks it's a win.
- the 3-second hook: if you don't like it in 3 seconds, you swipe. so creators just optimize for the instant hook, not actual good content.
- endless scroll: there is no bottom. the next video is just one swipe away.
so even when you are "relaxing", you are training your brain to want constant new stuff and quit when bored.
what can you actually do?
- just know about it: knowing that reels hurt your focus is step one. you're not broken, it's just a bad habit.
- watch long stuff: read a long article or watch a full movie. give your brain some practice paying attention.
- set limits: use app timers. don't let "just one more" ruin your whole hour.
- swap it out: instead of scrolling, maybe try building something or learning a new skill.
wrapping up
the data is real. heavy short-form use hurts your self-control and focus. the apps are designed to trap you, not help you.
you don't have to quit entirely. but treat it like junk food—have a little, but don't make it your main meal.
written by sourav mishra. stay focused out there.