Play YouTube Videos on Facebook without leaving the site.

Facebook has removed the ability to play YouTube videos on Facebook, at least for some of their users.

This script will restore that option, so you don't have to leave the site. :)
The video will play when you click the link.

I have spent many hours trying to make it compatible with most URLs, but please do report any issues so i can get them fixed.

Suggestions and improvements of the code are welcome! :)