Solved! You tube cannot play videos

Solution
If you are indeed using an old OS, you need to update to Windows 7 or 10 because the Flash Player is a known security risk and is no longer being updated to plug the holes --- effectively it's dead. Latest OS with latest web browsers don't need Flash Player for YouTube video playback.
If you are indeed using an old OS, you need to update to Windows 7 or 10 because the Flash Player is a known security risk and is no longer being updated to plug the holes --- effectively it's dead. Latest OS with latest web browsers don't need Flash Player for YouTube video playback.
 
Solution