[kettlecorn]

YouTube not being on Windows Phone is really Microsoft's fault. They wrote their own "YouTube" app that removed ads and allowed downloading videos. Google rightfully was like "No way" and Microsoft continued to be belligerant.

Google didn't want to let Microsoft develop their own YouTube client because Google frequently changes how the YouTube client works. Microsoft could have wrapped the web client, but after they acted stupidly Google didn't want to further cooperate.

[philliphaydon]

Ah, YouTube API's do not supply ad's. Google refused to make an app for Windows Phone. MS created an app with the available API. Google didn't want to work with MS to address any issues Google had with it.