The link you want to post is:
First, don't use the EMBED code that is provided on many YouTube videos.
You also cannot just enclose the above link in the YT and /YT (in brackets). On this board, you need to post only the video ID, which in this case, is at the end of the link: u7mG512VGkw
Note: If you had copied the link from your address bar while viewing a video you had accessed via YouTube's RELATED VIDEOS, then the link you copied would have looked like this:
(Note that the normal link is followed by &feature=related
In that case you need to delete everything from the & on (&feature=related
) and everything from the = back (http://www.youtube.com/watch?v=
Then, enclose what is left (u7mG512VGkw
) in the YT and /YT (with brackets).
What you end up with is this: