Oh, it's absolutely not easy finding that niche content. You're going to need to swipe past a lot of cleavage to find anything else. To get more of whatever you're currently on, re-watching, liking, commenting all probably work. To get less, either swipe past quickly or long press (I think?) and you can choose "not interested" or something. I think there are other ways to block particular creators and sounds (and maybe filters?) if you don't want to see that specific thing.

The search does leave something to be desired - the app is very much designed for just endless scrolling.