I have a Dell Dimension 2400 (2.66ghz) and run ubuntu 8.04.
I just installed ubuntu and went to youtube. It asked me to install 3 things so I did. (Adobe flash player 10, swfdec, and swf-gnash-plugin.) Everything installed fine, I restarted the browser clicked play on the video and NOTHING! Just black screen, tried waiting for up to an hour and no change.
Help would be very appreciated.