Yeah that's what I thought, but maybe it would be possible to build clients that cache the last X videos and seed them while tab is open.

Another solution I could imagine people offering high bandwith seeding of torrents creators could pay for, maybe as DVM.
You upload a video, pay 1000sats for seeding in Europe + US for 30days. Then hopefully it should have enough natural seeders. You think this would work?
Nice thing with torrents is they are so interoperable so everyone can offer seeding etc. no special APIs or closed providers.