He's calling it semantics because of Dunning-Kruger. Because he doesn't really know how any of this works, but his ego is so big Superman couldn't lift it, he inflates his surface understanding to expert level.
Tmo should publish a spec that allows any provider to meet their definition of optimized video and therefore qualify for binge on. I'm totally fine with it as long as they don't get to choose who gets unlimited streaming.
As it is, and as a current tmo customer, this is eye opening. Tmo had always seemed to be the voice of reason in American wireless. What they did with contracts was a massive step in the right direction.
But this makes it look like they don't actually get it. They just happened to accidentally get a few things right.