0.8 seconds, no tap: the swipe that teaches the feed

transcript

You flick a video away in 0.8 seconds. You tapped nothing. The feed still learned something.

In a follower feed, most posts end in silence. Only a like counts as a label. In a swipe feed, every video ends in a number. How long your thumb stayed still.

A 15-second kunafa video. Watched for 30 seconds. It looped. A 45-second dance video. Gone at 0.8 seconds. A 3-minute recipe. 60 seconds, and a like. A 9-second clip. Watched to the end.

But here's the catch. Raw seconds favour long videos. Raw ratios favour short ones.

So compare with videos of the same length. The kunafa? Far above typical. The recipe's 60 seconds is ordinary. The like makes it positive. Finishing a 9-second clip? Weak evidence.

And that 0.8-second skip? A strong negative. For the video, its creator, its sound and its topic. Few people tap Not interested. Skips are how it learns.

No tap needed. Every swipe is a label.

Full breakdown in the lecture.