If you have Xbox LIVE Gold the you now have the ability to download the new YouTube app. This amazing new app will bring the wonderful world of YouTube right to your TV in all of its amazing glory. Paired with Kinect, it makes searching through the mass amount of videos just a few audible commands away. With more and more videos on YouTube being available in HD this is a perfect match for the modern entertainment center (Xbox 360).
Source: Redmond Pie