Whenever I see any video in my feed I don't want to watch I just do that, and since it runs out of things then it has no choice but recommend new and different things.
I'm only aware about the "Not Interested" menu option, but I doesn't reliably remove the video from my feed. It would probably get removed for a particular viewing session, but I usually found it gets recommended again after some days.
Is there anyways to remove the video permanently ?
If your recommendations are currently absolute trash it might even be best to clear your watch history altogether and start from scratch.
But FWIW... it's absolutely worth it. The YouTube recommendation algorithm, when trained, works REALLY well and is a gold mine of useful content.
If you search you'll find this is extremely common - I think there was even a HN post about it a few weeks ago.
Then suddenly a few weeks ago it totally stopped working. I'd click "don't recommend this channel" then refresh and the channel would be right there.
I researched and the recommendation to fix this is to clear your watch history. So I did that, and it cleared all my recommendation building entirely. "don't recommend this channel" works again but I'm starting from scratch and no doubt it'll stop working in the future again.