Algo asi..
peli.swf?Variable=Valor
<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,29,0" width="450" height="335">
<param name="movie" value="peli.swf?Variable=Valor">
<param name="quality" value="high">
<embed src="peli.swf?Variable=Valor" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="450" height="335"></embed>
</object>