Nice!

I am a bit skeptical about "down to about 1 second" being achievable with DASH or LL-HLS reliably. Of course, I could be wrong. And a lot depends on the definitions of "about" and "reliably," as well as your user cohort (where they are in the world, etc). :-)

The reason I didn't write much about DASH is that the basic concepts are the same for both DASH and HLS. And my sense for the last couple of years has been that most of the momentum in the ecosystem as taking place around HLS/LL-HLS. But I could be wrong about that, too.