Nice site. This will clear up your youtube validation issue, or it does for me using 4.01 strict. Just change the names/sizes to taste.
Code:
<object type="application/x-shockwave-flash" data="http://www.youtube.com/v/Z5uHt4AwYb4&hl=en&fs=1&rel=0" width="440" height="356">
<param name="movie" value="http://www.youtube.com/v/Z5uHt4AwYb4&hl=en&fs=1&rel=0">
<param name="wmode" value="transparent">
</object>
Make sure you use & in place of each instance of the ampersands. And adding rel=0 will stop youtube from showing related videos after yours finishes playing.
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