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Own a Roku TV or streaming device? You're about to see a lot more ads on your home screen
(www.techradar.com)
This is a most excellent place for technology news and articles.
Torrent? PeerTube?
For paid options I see no sense in decentralization. But a standard protocol for rental tied with some protocol for payments (like GNU Taler) to rent movies from any source with one tap and no install would be cool.