Earlier quoted context omitted.
I'd just note some things Youtube doesn't have. It doesn't have any "the key words I'm interested are" section. It doesn't have any fine grained "show me less like this" or "show me more like that" options. That all the filters of net (Google, FB, etc) have convinced users that an out-of-their control recommendation system is a triumph of this sort of system. If you just demand the recommendation system be different,…
YouTube has the "Not interested" and "Don't recommend channel" buttons, as well as upvotes, upvotes, downvotes, and subscriptions.
The issue with the "Not interested/Don't recommend channel" is that it's the nuclear option. It does make content go away, but more often than not, what I really want is just to watch something else right now. The content might be perfectly fine and up to my taste, but when Youtube keeps recommending the same stuff again and again, there is no easy way to just reduce that a little without nuking it completely.