Playing and watching videos
: Game Consoles
I've been seeing questions about SD/HD video quality on the YouTube app and I wanted to provide a little more info. When you select a video to play, the app determines the best quality to stream depending on the available bitrate of the video and the speed of your network connection. Currently there's no way to change the video quality.
To make sure that you have an optimal network connection, please check out this Microsoft support article: