At least with Youtube, you can go through your watch history and delete videos, which makes it as if you never watched it as far as recommendations are concerned.
Removing the source of the recommendation from your history works a lot more reliably. Sometimes the "Not interested" button will allow you to say "I don't want recommendations based on <X> videos", but they're in denial about how that's the only thing their recommendation engine does, so the option isn't always there.
You mean like incognito mode on Chrome? Unfortunately I like most of the bubble I've built for myself of Youtube. It sucks when my recommendation stream of mostly educational videos from smart, quality-driven DIYers and educators gets overwhelmed with 5 Minute Crafts type garbage because I put on one "oddly satisfying compilation" to run in the background while playing boardgames with friends or something.
With the music playlists I just really really want a button that would mark certain songs as "I like them, but not so often". Disliking makes certain artists and styles fall totally out of my playlists, not disliking makes it repeat like a broken record.
@kleer001, click on the options button (the three dots) for any video you’re uninterested in on YouTube and select “not interested.” This should help your generated feed.
You need to counter-train the algorithm to get useful results out of it basically. Keep ignoring those videos, mark them as boring, refresh the page, etc. do content discovery the old-timey way.
It reminds me of Cronenberg's "The Fly" where Brundle had to teach his teleporting pod to reproduce living tissue rather than interpret it.