After making do with an “app” that was little more than a hyperlink to YouTube’s mobile web version, Windows Phone users finally get a fully supported (though still Microsoft-designed) YouTube app to call their very own. You’ll be getting everything we’ve come to expect from a Youtube app.
That includes sharing videos on any number of social media platforms, account sign-in and access, and continued background audio even when you minimise the app. Plus, in true Windows Phone style, you’ll be able to set videos, playlists, channels and specific search queries as Live Tiles.
If you already had the original “app” you should be getting an update notification, but first time downloaders can pick up the upgrade right over here. [Windows Phone Blog]