While Microsoft's YouTube app leaves much to be desired (granted, it's not their fault), it seems light is at the end of the tunnel for fans of the video sharing website with HTML5. As IE9 in Mango will be making short work of HTML5 we were hoping that Google would make the mobile version of their media community portal open to Windows Phone Mango.
Alas, it seems as though we've conquered video playback via IE9 in Mango, thanks to Google. This is a massive improvement over what was available to WP7 users. A sleeker interface is present with playlist access, commenting and more. It's still not a full-featured app with account management and more, but hey it's something. Don't forget Lazyworm.