I like my own Youtube videos. It’s priming the pump there as they don’t count them the way way. For Facebook, I went through period of ‘gaming’ the like thing to change what Facebook thought of me. I still do that now and again.
Biggest impact on FB’s algorithms has been working with the ads by looking at “Why am I seeing this ad?” and working with that.
Lately I’m allowing it to show me ads that tell me I should give Bibles to kids just so I can see the atrocious ads. I don’t know how I ended up at that but it’s amusing so it can stay for now.