Heres the way I have got it coded.
{if $vidtype eq "YouTube"}
<script type="text/javascript" src="/swfobject.js"></script>
<div id="player"><a href="http://get.adobe.com/flashplayer">
<h2>Hello, you either have JavaScript <br />turned off or an old version of Adobe's Flash Player. Get the latest Flash player. </h2>
</a></div>
<script type="text/javascript">
var so = new SWFObject('/player-viral.swf','mpl','700','370','8');
so.addParam('allowscriptaccess','always');
so.addParam('allowfullscreen','true');
so.addVariable('autostart','true');
so.addVariable('height','370');
so.addVariable('width','700');
so.addVariable('logo','http://www.askshave.com/templates/askshave/images/video-logo.png');
so.addVariable('file','file=http://www.youtube.com/v/{if $video[video].file eq
""}{$videoid}{else}{$video[video].file}{/if}&autoplay=1&logo=http://www.askshave.com/templates/askshave/images/video-logo.png');
so.addVariable('id','6213');
so.addVariable('searchbar','false');
so.addVariable('showdownload','true');
so.write('player');
</script>
ofcourse change the logo link from my logo to yours.