[ulber]

>Google can't fulfill those obligations if those videos are showing up on WinMo without ads.

The mobile YouTube site that Google serves to Windows Phone devices does not display any ads. Therefore an ad-free app for WP does nothing to change the situation that WP users don't see ads on YouTube.

Now, it is possible that some of Google's content is licensed in such a way that only their mobile site is exempt from displaying ads while any native apps are not. However, a C&D hardly seems like the proper course of action here, given that Microsoft says they are willing to display Google's ads.

[cbhl]

> The mobile YouTube site that Google serves to Windows Phone devices does not display any ads.

Right, but the mobile YouTube site could exclude videos that require ads to be shown.

> Therefore an ad-free app for WP does nothing to change the situation that WP users don't see ads on YouTube.

It's possible (although I don't own a WP so I don't know) that the app for WP shows videos that it "shouldn't" without ads.

[makomk]

The mobile YouTube site that Google serves to Windows Phone devices presumably doesn't play videos that are marked as unavailable on mobile, whereas Microsoft's app apparently ignores that flag and plays them anyway.

[fpgeek]

If Google didn't send a C&D, I'd say there's a good chance that another company would. Don't forget that pesky download button.