Get the url of the video you want on youtube.

Like http://www.youtube.com/v/WBK0i83ip78

Now you need to make a slight change to the url. Add watch after youtube.com/ and add a questionmark. change the slash after v to =

So the youtube provided url becomes http://www.youtube.com/watch?v=WBK0i83ip78

In the toolbar choose to insert video. Its the one just to the left of the quote button. Once you click it, a dialog box will appear.


Just paste the url in.