They have recently updated the YT app so it looks a lot better but i still have issues with it freezing every so often and crashing the Xbox so think i'll start watching through IE.
Yeah definitely try it out as it's so much better than the YT app. Plus you have access to all the features. I was quite surprised to see every video run but especially when they play in 720p so well. It was the one thing most poeple who used IE moaned about so it's nice to see MS sorted it!