> How could a viable competitor to YouTube even begin to pull away YouTube’s inertia without massive vc funding?

I think it depends on what people are trying to do with youtube. I doubt any one new service could replace all of it. Plenty of people want to share videos but aren't looking to get rich from it though. For them, I think a competitor that does video delivery well, but doesn't pay for views could exist.

People who want to make videos for money would have a harder time replacing google, but lots of creators get direct support already so it isn't hopeless. A lot of people are already on multiple platforms now too so it doesn't have to be a hard cut off.