Honestly the best way I’ve seen this handled is how Odysee did it. There’s crypto involved, but ignoring that, they essentially just asked users to choose to allocate an amount of their hard drive/bandwith to be used for storing, and sharing videos.

That would work better from an end user perspective, rather than running their data usage up, and using storage on a storage-limited device like a phone, and I’m sure there’s a way to incentivize it that isn’t crypto