The
<EMBED> tag allows media file types other than those directly supported by the browser to be handled with an external application or plugin. In this case, the external application is QuickTime Player and the plugin is the QuickTime Plugin. 
PAGEot is an application which generates EMBED and OBJECT code for the QuickTime Plug-in.
QuickTime and Microsoft Internet Explorer for Windows, versions 5.5 SP2 and 6.0
Microsoft Internet Explorer for Windows, versions 5.5 SP2 and 6.0 (soon to be released) no longer support Netscape-style plug-ins, such as the plug-in installed as part of QuickTime 5.0.2 and earlier versions. Consequently, Windows customers using these versions of Explorer may be unable to view QuickTime content in the browser. Mac users and Netscape users are unaffected,
To restore compatibility, Apple has provided an ActiveX control.