<object id="player" classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" name="player" width="400" height="250" align="left" style="margin: 0px 13px 13px 0px;">
<param name="movie" value="jwplayer/player.swf">
<param name="allowfullscreen" value="true">
<param name="allowscriptaccess" value="always">
<param name="wmode" value="opaque">
<param name="flashvars" value="file=../video/video.mp4&image=../video/preview.jpg">
<embed
type="application/x-shockwave-flash"
id="player2"
name="player2"
src="jwplayer/player.swf"
width="400"
height="250"
wmode="opaque"
allowscriptaccess="always"
allowfullscreen="true"
flashvars="file=../video/video.mp4&image=../video/preview.jpg"
>
</object>
a teraz sa možeš hrať so z-indexom. Pre flash objekt je nutné nastaviť wmode=opaque potom funguje z-indexovanie.
btw: EMBED je nevalidný.
.. A viem že nieje valid, ale tak ako určite vieš, tento player nieje môj a nahadzoval som to strašne rýchlo. Ak poznáš ako to zvalidniť, rád sa poučím 
