"Microsoft has not made the browser upgrades necessary to enable a fully-featured YouTube experience, and has instead re-released a YouTube app that violates our Terms of Service," says a spokesperson. "It has been disabled. We value our broad developer community and therefore ask everyone to adhere to the same guidelines."
If that is so, Google should come out and say that instead of hiding behind a façade and playing whack-a-mole with the API, terms that are ambiguous and selectively enforced and making a mockery of the word 'open'.