How about e.g. supporting video streaming through webtorrent, where the video works as long as someone's hosting it?

Webtorrent might work for *downloading* stuff. But for streaming media, you want the blocks in a certain order (first-in first-out) and in 2023 you want the niceties that HLS provides, like adaptive streaming. So probably not, unless there's something I'm missing? (It's been a while.)