Ho trovato questa lezione e diciamo seguendo il tutto passo per passo sono riuscito a risolvere il problema di visualizzazione su firefox però...
http://grafica.html.it/articoli/legg...roprio-sito/9/

Date uno sguardo a come si vede il tutto:

Artgallery75

Si vede schiacciato su firefox!!!

Questi sono i pezzi di programmazione che ho usato nella pagina:
<script language="VBScript">
<!--
On Error Resume Next
lngMP70 = IsObject(CreateObject("WMPlayer.OCX"))

' Windows Media Player 7 Code
If (lngMP70) then
document.write "<OBJECT ID=MediaPlayer "
document.write " CLASSID=CLSID:6BF52A52-394A-11D3-B153-00C04F79FAA6"
document.write " standby=""Loading Microsoft Windows Media Player components..."" "
document.write " TYPE=""application/x-oleobject"" width=""435"" height=""411"">"
document.write "<PARAM NAME=""url"" VALUE=""filmato.wvx"">"
document.write "<PARAM NAME=""AutoStart"" VALUE=""true"">"
document.write "<PARAM NAME=""ShowControls"" VALUE=""1"">"
document.write "<PARAM NAME=""uiMode"" VALUE=""mini"">"
document.write "</OBJECT>"

' Windows Media Player 6.4 Code

else
document.write "<OBJECT ID=MediaPlayer "
document.write " CLASSID=CLSID:22d6f312-b0f6-11d0-94ab-0080c74c7e95"
document.write "CODEBASE=http://activex.microsoft.com/"
document.write "activex/controls/mplayer/en/nsmp2inf.cab#Version=6,4,5,715"
document.write " standby=""Loading Microsoft Windows Media Player components..."" "
document.write " TYPE=""application/x-oleobject"" width=""435"" height=""411"">"
document.write "<PARAM NAME=""FileName"" VALUE=""filmato.wvx"">"
document.write "<PARAM NAME=""AutoStart"" VALUE=""true"">"
document.write "<PARAM NAME=""ShowControls"" VALUE=""1"">"
document.write "</OBJECT>"
End if

-->
</script>

e nel punto dove voglio io:

<object id="MediaPlayer" classid="CLSID:6BF52A52-394A-11D3-B153-00C04F79FAA6" standby="Loading Microsoft Windows Media Player components..." type="application/x-oleobject"
height="411"
width="435" style="padding:1; " align="middle">
<PARAM Name = "autoStart" Value = "-1">
<PARAM Name = "uiMode" Value = "full">
<param name="URL" value="video/sfilata20.mpg" />
<param name="rate" value="1">
<param name="balance" value="0">
<param name="currentPosition" value="0">
<param name="defaultFrame" value>
<param name="playCount" value="1000">
<param name="currentMarker" value="0">
<param name="invokeURLs" value="-1">
<param name="baseURL" value>
<param name="volume" value="100">
<param name="mute" value="0">
<param name="stretchToFit" value="0">
<param name="windowlessVideo" value="0">
<param name="enabled" value="-1">
<param name="enableContextMenu" value="-1">
<param name="fullScreen" value="0">
<param name="SAMIStyle" value>
<param name="SAMILang" value>
<param name="SAMIFilename" value>
<param name="captioningID" value>
<param name="enableErrorDialogs" value="0">
<param name="_cx" value="11509">
<param name="_cy" value="10874">
<embed type="application/x-mplayer2" pluginspage="http://www.microsoft.com/Windows/MediaPlayer/" name="MediaPlayer1" height="411" width="435" src="filmato.wvx" filename="filmato.wvx" autostart="True" showcontrols="True" showstatusbar="False" showdisplay="False" autorewind="True">

</embed></object>

poi ho creato il file filmato.wvx dove ho inserito questo codice:

<asx version="3.0">
<entry>
<title>Video Book Ilaria E.</title>
<author>Graveyard Entertainment</author>
<ref href="video/sfilata20.mpg"/>
</entry>
</asx>

Cos'è che sbaglio?

Thank's