I am a long-time fan of content-addressing. And, I think it is important.
But, I think (in addition to that) we also need to think about social-technologies.
For example, how can we incentivize Fediverse users to save an re-share files, such as video files.
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There were platforms from the DC++ and BitTorrent eras that I think did a good job of encouraging this (through the social-technologies they created).