[cd34]

Remember that Windows uses the <object> portion, and firefox uses the <embed> portion

<OBJECT id="VIDEO" width="320" height="240"
   CLASSID="CLSID:6BF52A52-394A-11d3-B153-00C04F79FAA6"
   type="application/x-oleobject">
    
   <param name="URL" VALUE="http://videofile">
   <param name="SendPlayStateChangeEvents" VALUE="True">
   <param name="AutoStart" VALUE="True">
   <param name="uiMode" value="none">
   <param name="PlayCount" value="9999">
   <param name="rate" value="1">
   <param name="balance" value="0">
   <param name="currentPosition" value="0">
   <param name="invokeURLs" value="-1">
   <param name="volume" value="90">
   <param name="mute" value="0">
   <param name="stretchToFit" value="-1">
   <param name="windowlessVideo" value="0">
   <param name="enabled" value="-1">
   <param name="enableContextMenu" value="-1">
   <param name="fullScreen" value="0">
   <param name="enableErrorDialogs" value="0">
   <embed type="application/x-mplayer2"
      pluginspage = "http://www.microsoft.com/windows/mediaPlayer/"
      id="Player"
      src="http://videofile.wmv"
      width="320"
      height="240"
      showcontrols="0"
      showstatusbar="0"
      autostart="true">
   </embed>

  </OBJECT>

The above is what I had tested in IE, Firefox, and Safari ages ago.