The YouTube app for WP8 feels like a watered down version of the YouTube you might be used to. Metrotube attempts to give you the easiest and most efficient YouTube experience out there. It's easy to navigate, has simple playback controls, and looks good while doing it. Where the official app may let you down, Metrotube will lift you back up, and should be your go-to for YouTube viewing.
Click here to Download it Now from the Windows App Store