Not sure if that's what you are asking, but there's https://grayjay.app/ (also https://futo.org/) connected with Louis Rossmann, that is meant to bundle multiple streaming service. If is meant to give power to creators, by not forcing them to YouTube.
Yeah, I also don't think he needed to do it this way. All he had to do is just trademark the name and would still had similar part to go after scammers (although I don't think trademark or license would help as they already doing legal things).
But as far as I know GrayJay is the only app that bundles different platforms together.
I think making it open source could help if Google and others would go after it and they will once they can find some law or something to use against it.