Torrents solved this problem (big data distribution) over 20 years ago now, and is still a sizeable chunk of all internet media traffic.
All that's needed is for people to actually create torrents for their content, and a user friendly way for people to post and view magnet links.
I'm trying to integrate them into lemmy in various ways: https://github.com/LemmyNet/lemmy/issues/4204
Sure, a lot of people do even have entire youtube playlists and channels shared on torrents without their consent even, downloaded with youtube-dl. Getting existing content onto torrents should be pretty easy.
We do need to get these content creators to create and seed their own torrents also tho, rather than have everyone else do it on their behalf, then post their own torrent links so others can help seed.
The only clean way I see this happening is some kind of a tool that simplifies this, or a readme that can help with the process, possibly linked to lemmy's post creation as a video/audio upload button, and on any other platform that supports magnet links.
If anyone knows of something like that already, it'd be really helpful.