15.04 is long obsolete (support ended over a year ago), so there's probably no flash player updates to it anymore. Upgrade or reinstall.
not an X bug anyway ** Changed in: xorg (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1677050 Title: Youtube video will not run To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1677050/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs