Why the feed never ends
You open the app to "watch one video." Forty minutes later you're still there — and you can't recall a single clip. That's not weak willpower. That's engineering.
The feed is designed to be endless
Content used to have an edge: the newspaper ended, the show finished. The feed has no edge. It's called infinite scroll, and it exists precisely so your brain never hits a natural "okay, that's enough."
Every swipe is a tiny lottery ticket. Sometimes something lands. That unpredictability is what holds you hardest.
Dopamine promises — it doesn't reward
Dopamine fires not when things feel good, but when you anticipate they will. The feed exploits anticipation. That's why the scrolling itself feels better than any single video.
What to do about it
Don't fight yourself — remove the endlessness. Put an edge back by hand: a timer, a grayscale screen, the phone in another room. The environment will decide what your evening willpower can't.