When you select not interested, it gives the option of saying it's either because you already watched the video or that you don't like the channel. I don't know quite why they keep recommending videos I've watched recently, but at least telling YouTube I've seen a video (...) prevents it from spamming my recommendations.

> I don't know quite why they keep recommending videos I've watched recently

You probably don't have kids.

That, and music videos.

Though it feels like both scenarios should be pretty easy to handle algorithmically.

Because kids watch furniture restoration videos that GP was talking about?

you can tell youtube you've already seen it. you hit "not interested" and then click "tell us why" and then hit "i've already seen it".

It's quite a few clicks when you could just mentally skip over it, but indeed I wanted it to learn so I went through the trouble. Again and again. Probably more than a hundred times. It doesn't learn. I just pass over them now. The algorithm probably knows better than all of us what keeps us longer on the site anyway and the button is just a dummy.

Thanks. I never got to that step because I didn't know there'd be another question.