I think one of the biggest challenges is alternate choices for creators. If everybody posted their content to YT plus another platform, things would naturally start shifting.
If a channel I follow posts to Odysee then I watch it there. I follow multiple channels that also post to Nebula, so I try to watch it there.
But there's no clear standard for what platforms are good for what. There's also a paywall issue with some (like aforementioned Nebula) that not everybody will be able to pay. I've also tried Curiosity Stream, and never watched it because there was no content I found worth it.
Then there's the technical issues. I can't believe that I am paying for Nubula when their app sucks so badly. (I will probably cancel but haven't yet). Odysee is so much better than when it launched but it's still a pile of dung. PeerTube I never felt worked well at all, so much so that maybe I'm missing something. But while I might not be the sharpest tool in the shed if I can't figure it out then its a bad platform.
So in all reality, there isn't a replacement for YT. I wish there was, but there isn't. There should be, but there isn't. Yes, we should try to post alternate links and such, but that's not going to make much of a difference in the end.
And sorry, this all came out significantly negative sounding. I don't mean to be crapping on the post or the idea. I just mean to point out that the issue is much deeper than user interactions. There's an infrastructure problem first (we need a viable working alternative), then a content problem second (we need to convince creators to move there), and only last is there a user interaction issue (which this post is discussing).