<object width="425" height="355"><param name="movie" value="http://www.youtube.com/v/yql_lDmHgqY&rel=1"></param><param name="wmode" value="transparent"></param><embed src="http://www.youtube.com/v/yql_lDmHgqY&rel=1" type="application/x-shockwave-flash" wmode="transparent" width="425" height="355"></embed></object>Just FYI, to post embedded flash movies from youtube etc, select HTML On - Raw Linebreak Mode from "Post Options" and paste the code, above movie code will look like this:
CODE
<object width="425" height="355"><param name="movie" value="http://www.youtube.com/v/yql_lDmHgqY&rel=1"></param><param name="wmode" value="transparent"></param><embed src="http://www.youtube.com/v/yql_lDmHgqY&rel=1" type="application/x-shockwave-flash" wmode="transparent" width="425" height="355"></embed></object>