It is important to get this right. Find the link of the video you'd like to submit on YouTube. The link should look something like this:

http://www.youtube.com/watch?v=ncMPGgNOD_o

There may be some other code on this, but look for what comes after "v=" as shown above in black. In this case you would enter ncMPGgNOD_o into the box to the left.