My Previous post about doing this was using a previous api and using callback to get the info.
Thanks to Shix_ for pointing it out there is a easier way to do this.
Simply drop this html into the place where you want the video and change the username with your username and its done.
<iframe width="300" height="200" src="http://www.youtube.com/embed?max-results=1&controls=0&showinfo=0&rel=0&listType=user_uploads&list=YOUR_USERNAME_HERE" frameborder="0" allowfullscreen="allowfullscreen"></iframe>