I have been having nothing but problems with Flash Video Players on YouTube. There is no sound, and it will not continue to play for longer than 2 seconds when you start a video.
I have removed the Flash 10 plug-in, and downloaded the Flash 9 .deb package from Ubuntu's repositories. I can't get this to work, and it hasn't worked right since I loaded Mint on. Any suggestions? A Re-install of Firefox?