Earlier quoted context omitted.
Seems that the days of "Best viewed in browser X" have come back sadly.
When you give a browser a 70% market share it will always start abusing its position. Same as last time.
Google is actively involved in the standardization process, and moved Youtube over to a new API too prematurely (v0 of a spec). Now that v1 has been standardized, they're updating to that instead.
These are opposite problems. Microsoft got complacent whereas Google moved too fast.