Interesting, where are you seeing those numbers? Their streams seem exceptionally performant, but ~50Mbps seems pretty low for that content. The specifications for 3840x2160 HDR at 30fps is 34000 kbps - doubling that to get a similar resolution or tripling to get a similar frame rate greatly exceeds 50Mbps. (Not to cast too much doubt in that number - Apple has a much better production and distribution pipeline than an indie developer)