Ask HN: Can there be a YouTube with the Wikipedia model?

I was wondering about all those awesome channels in Youtube like CPG Grey and Veratasium, Crash Course, Smarter-Everyday. Sometimes I feel like those channels get buried, among all the other Youtube garbage.

I was wondering if there can be video platform like Youtube that doesn't run on ads, but donations? Or would that be too expensive? Is there a platform like that already?