hey @jrswab thanks for another great post! I didn't know about the other services you had mentioned in this post, but I have been looking in to D.Tube. I really like the idea of a decentralized video streaming service on top of the STEEM blockchain.
However, I am having a hard time wrapping my head around the IPFS protocol they use to stream the videos. It sounds similar to BitTorrent, maybe you know more about it? I need to keep doing some research.
I do not know anything about IPFS at this point since I have not looked into the technical details of how Dtube works yet. Much sorry mate.