I assume they get "monetization" from Youtube and they don't need to worry about hosting or discovery. Probably better than doing nothing with these films.
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I'm also a little surprised no one has yet (AFAIK) done the "viral indie release to Youtube" path. I feel like it's sitting there waiting to be exploited.
It's not. At least not for companies of that size. There is PeerTube for that: https://joinpeertube.org/. It can even decrease the load to your servers by spreading the trafic over peers.