This sounds reasonable, but it doesn't seem to reflect reality. The biggest reason that shows are region locked and/or removed from streaming sites are licensing deals, not technical reasons. Movie and TV production companies are the ones pushing for the region locks, and the ones selling limited distribution rights to streaming services.

So, while you are right that video streaming is much more costly than audio streaming, I think GP is overall more correct about the reasoning being production costs rather than anything to do with distribution.

Maybe there's an opportunity for a media host to farm out data for preservation by clients (end users' computers) - what I'm thinking is torrent essentially, where the data-unit is a scene (or a series of frames between n key-frames). Clients get access to that show if they agree to store m chunks. The media repo can sell access whilst only keeping a copy in cold-storage because you can 'popcorn time' the show from the pool of user-clients.

Reduced hot-storage, increased playlist. Sort of media communism but the capitalists still hold the keys?