oppure:Sostituisci il codice della tua pagina html con questo codice e avrai il filmato al centro in altezza e larghezza, ciao

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>tetrapak</title>
</head>
<body bgcolor="#000000">
<table width="100%" height="100%" border="0" align="center" cellpadding="0" cellspacing="0">
<tr>
<td align="center" valign="middle"><object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://fpdownload.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,0,0" width="800" height="500" id="tetrapak" align="middle">
<param name="allowScriptAccess" value="sameDomain" />
<param name="movie" value="tetrapak.swf" />
<param name="quality" value="high" />
<param name="scale" value="exactfit" />
<param name="bgcolor" value="#000000" />
<embed src="tetrapak.swf" quality="high" scale="exactfit" bgcolor="#000000" width="800" height="500" name="tetrapak" align="middle" allowScriptAccess="sameDomain" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" />
</object>
</td>
</tr>
</table>
</body>
</html>