Has anyone else been having this problem? You click the yt vid's "play" button and are given a black screen with a 0:00 counter and cannot watch the video: http://imgur.com/TKnsQ (screenshot)

It seems to only affect some yt embeds, and since I can open them in Chrome I'm guessing it's Opera's fault... any idea how to fix it?

Edit: @Porksandwich's trick of clearing the cookies did the trick for me, yay!