Just played the video for The Fall in the 'embed' thread and after allowing the base site and YT (Noscript allows you to pick what you want to allow to run...nice way to keep Google out of your ass as well if you like) the video displayed and played properly. No warnings, no pop ups or directions to upgrade or install anything.
Noscript throws a big box in the middle of the screen and stops anything from happening if it appears suspicious or is in its database. ALWAYS follow its directions no matter what the **** video is that you are trying to see