The closest thing I’ve seen is lbry, where some creators have mirrored their YouTube accounts. But it feels like a very small number of them uploading there.

E to add: As with all alternative platforms, it’s also home to a lot of content that was kicked off of more mainstream platforms for one reason or another.

Peertube. Youtube, but with federation and webhooks.

TILvids.com is a peertube instance with a focus high quality educational content. There is vastly less content compared to YouTube but the videos that are there tend to be really good.

https://joinpeertube.org/ - this should help you get started with peertube

For desktop I use the FreeTube client. For mobile, there’s various options line NewPipe and Revanced. But these are all Android Only.