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-X, which is subscribed to xorg in 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 _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp