[AriaMinaei]

Well don't even get me started on DRM :)

But this particular use-case would still play well with DRM as it's implemented today. Netflix on the browser still has DRM, but since the <video> element is standard, it can still be hooked into and decorated.

[outadoc]

Sure... but "technically perfectly capable of supporting this kind of extensibility" is not true in my opinion, you'd need quite a few changes to allow this to happen safely. Apple doesn't even want apps to be sideloaded, so that's a stretch :)