So I was trying to make my site xhtml 1.0 strict compliant and my embedded youtube videos were breaking it. I do try to be standards compliant and only with my new theme have i gotten into xhtml for slantview.com.
Well, as it turns out, there is a great article over at http://www.wimpyplayer.com/support/faqs/docs/general_xhtml_compliance.html about this very topic...

For the lazy, here is the code:

<object
classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000"
codebase="http://download.macromedia.com
/pub/shockwave/cabs/flash/swflash.cab#version=6,0,0,0"
width="400" height="300" id="movie" align="">
<param name="movie" value="movie.swf">
<param name="loop" value="false" />
<param name="menu" value="false" />
<param name="quality" value="high" />
<param name="scale" value="noscale" />
<param name="salign" value="lt" />
<param name="bgcolor" value="#000000" />
<embed src="movie.swf?wimpy=options"
loop="false"
menu="false"
quality="high"
scale="noscale"
salign="lt"
width="320"
height="260"
name="wimpy"
align="middle"
bgcolor="#000000"
allowScriptAccess="sameDomain"
type="application/x-shockwave-flash"
pluginspage="http://www.macromedia.com/go/getflashplayer" />
</object>

Becomes:

<object type="application/x-shockwave-flash" data="movie.swf" width="400" height="300">
<param name="movie" value="movie.swf" />
<param name="loop" value="false" />
<param name="menu" value="false" />
<param name="quality" value="high" />
<param name="scale" value="noscale" />
<param name="salign" value="lt" />
<param name="bgcolor" value="#000000" />
</object>