If MS wants a top-end YouTube app, then they just need to move a meaningful number of units and Google will build the app themselves. Until then, they get the same treatment as Blackberry, Tizen, Firefox OS and any other marginal player, and *gasp* they need to follow the same rules.
I dunno , is this how you felt back in the day when IE was the only browser worth a damn ? If ms required such stupid things then google would barely have started.