Maybe it's because I am blind and so my point is a little bit different. But personally, I have never understood having much video over about 1080p, especially on a phone and possibly even 720p. Peertube and 720p would work great. Each creator could set up their own instance or pay someone to set it up for them, and if they ever blew up and got seriously big, the amount of people watching their videos would send to their peers and load balance across them so the server wasn't totally overwhelmed.