I found the code for it in the Rick Roll page:
Code:
<div style="float:right; margin-left:5px; margin-bottom:3px; padding:0px; border:1px solid #ffffff; font-size:100%; line-height:120%; padding:0.4em; background-color:#eeeeee; border-bottom:1px solid #ffffff"><youtube>[Video ID here]</youtube></div>