Oh, wow. Didn't know I can do that. Thanks, it was getting really hard to train the algo again with the things I want recommended on a certain account after accidentally searching for something of interest for another account.

Be sure to also mark videos as "Not interested" on your homepage, if you also did not know about that. You can even tell them not to recommend an entire channel.

This is actually why I use BlockTube. You can tell them not to recommend a channel but it still shows up in your search.

The not interested button doesn't really work for me, it just blocks that particular video but other videos in that category still show up no matter what.

The “Don’t recommend channel” button also doesn’t really work for me. It used to work, but now the channels keep coming back. YouTube has been trying to get me to watch videos from “Dr.” Sten Ekberg. After watching one video a couple years ago I quickly realised he’s full of shit. I’ve clicked the “Don’t suggest channel” button so many times, but after a short while his videos return to my feed.

I've done that for a while too.

Often if I want to watch a one-off video topic, I'll view it in private mode, so it doesn't get added to history. Then I don't really mess up the algorithm.