[lelandfe]

I can be pretty confident that once I've finished a video, that very same video will be on my YouTube homepage for weeks. It's useless.

At this moment, my homepage's first 10 videos include 7 that I've already watched.

[munificent]

> that very same video will be on my YouTube homepage for weeks.

I just right-click those videos and tell YouTube I'm not interested in it. That helps keep my homepage fresh while still being pretty good about recommending stuff I like.

One thing I think must be deeply challenging about recommendation on YouTube is that many videos like DIY informative stuff only warrant being watched once. But music, DJ mixes, livestreams, etc. I will watch over and over. So the signal "did I watch this" might mean "definitely do not show it again" for some videos and "definite do show it again" for others. It's probably hard for the system to distinguish those.

[gxqoz]

Maybe they're being fooled by toddlers who love rewatching the same video over and over again.

[ysavir]

Not even that, I bet. I've heard a lot about how YT is used for music by many people (myself included, sometimes), and recommending the song you just listened again probably has a good click rate.

[munificent]

Yeah, I have definitely watched the same DJ set dozens of times for some particularly good ones.

[8note]

Or people who are asleep and not switching away from auto-plays of the same video