Toribash
Original Post
Put the code after the "v=" in the [YOUTUBE][/YOUTUBE] tags.

For example, for this video, http://www.youtube.com/watch?v=lzjl0Cu9HgM, you would take "lzjl0Cu9HgM" and put it in the [YOUTUBE][/YOUTUBE] tags.
It would be [YOUTUBE]lzjl0Cu9HgM[/YOUTUBE],
And would show as this: