Employ human curated collections, no algorithms. There is simply no other way that guaranteed kid-friendly content will exist in a space. Otherwise people will game the algorithms and you get Elsa-gate.

I’ve talked about this before, but if you have kids, the only surefire solution is curating the videos yourself and downloading them. Then playing them offline. Anything else is a gamble, which may or may not be the route you want to take.

YT cracking down on videos also has a lot to do with skittish advertisers. I’m not sure if a solution is possible other than utilizing Patreon, librepay, etc. Even if you don’t make “controversial” content, that’s what most people do these days for consistency, as well as merchandise.