This only seems to be happening my Alienware 11x laptop. My Desktop still plays youtube videos at higher resolutions than 320p. But here is the description of my problem: It does not matter which version of firefox I use, 3 or 4, when I play a youtube video it will only run at 320p. If I try to make it play at 480 or higher the video freezes at the first frame while the video plays out. If I switch it back to 320p it plays normally. This never used to happen so I'm wondering what could be the problem?