Are you behind a Firewall or something like that. It seems as if the flash-plugin couldn't connect to the video (streaming) server.
At school I recently face the same problem on Windows. At home (ubuntu) everything works fine. -- all youtube videos come up as "unavailable" https://bugs.launchpad.net/bugs/350971 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs