Using a perfectly fresh install of Lion with Parallels 7, with nothing additional installed other than Flash, I cannot get YouTube videos to play at all (tried Safari and Firefox). I simply get black and white flashes when the video tries to play. Video from other sites (ie. Vimeo) plays fine, flash ads and flash games play fine, even the video advertising on YouTube works fine, it's just actual YouTube videos that will not play. I've tried reinstalling to no effect. Is this an issue for anyone else? I was intending to use this VM as a testbed for a YouTube-integrated app but this issue has made Parallels worthless to me. The sooner I can get this working, the better.