While I love the fact that you can embed YouTube clips, it is kind of annoying that you can't go into full screen. When this feature was implemented on this site, full screen wasn't possible in the embedded player, but it has since been made available.
What is needed is to add the "allowfullscreen" parameter. For reference:
http://code.google.com/apis/youtube/pla ... eters.html
If you have time, It'd be nice!