Take a look at myTube, a wonderful new YouTube client for Windows Phone 8
You shouldn’t have to stop your YouTube videos just to read a couple comments.
myTube is designed to keep your video playing, no matter what. Read comments, check out a user’s channel, search for videos, and even change settings without ever missing a bit of your video; all the while running at a clean 60 frames per second. The result is one of the smoothest and most fun YouTube experiences you can get on your Windows Phone.
And with one of the most beautiful live tiles around, myTube is worth a shot. I think you’ll like it
Grab it here for 99c, with a free trial.