Would it make sense to build a video sharing platform instead of a video hosting platform? Like having your own RSS feed or email newsletter, if people are following you via a Nostr video platform and you usually share YouTube videos - then suddenly share a Peertube video - it won't matter since people can still follow you.

There's a similar idea behind https://docs.polycentric.io/protocol/ though it uses Ed25519 so there's probably not an easy way to build a Nostr based video sharing platform combined with it.