use this code [video=youtube;XXX]http://www.youtube.com/watch?v=XXX[/video.] Remove the dot at the end and replace the XXX with the letters that come after the equal sign in the youtube address
here's a friendly tip when learning how to use new forum features: quote someone else so you can see how they did it.
As for the video I posted, it's about the Red Bull Stratos project.