BTW, Drammy boy made it so that you can embed YouTube vids in messages, as above.
Just encase the youtube ID number, such as fEk6Hkdtquw (taken from the URL of the video
http://www.youtube.com/watch?v=fEk6Hkdtquw), and surround it by the tags [yt] and [/yt].
Such as:
[yt]fEk6Hkdtquw[/yt]