I have the latest QT player for Lion. I try to play Mpeg-4 or MP4 vids with no success it keeps telling me I need the MP4 plug in. It's there. I even downloaded Flip 4Mac to help it along. This player is a real bummer. Is there a better/best player out there. Be advised I already have Mplayer (another loser), VLC (not bad), and Realplayer (another loser). What do you Lion users have the best success with??