Yes, I think most video on the Internet is HLS and similar approaches which are about as far from the ATM circuit-switching approach as it gets. For those unfamiliar HLS is pretty much breaking the video into chunks to download over plain HTTP.
Yes, but that's entirely orthogonal to the "coding" algorithms being used and which are specifically responsible for the improvement that GP was describing.
HLS is really just a way to empower the client with the ownership of the playback logic. Let the client handle forward buffering, retries, stream selection, etc.
