Ok guys I found the problem
The {URL} code is incorrect, simply change with {param}
here is the working code:
HTML Code:
<object classid="clsid:67DABFBF-D0AB-41fa-9C46-CC0F21721616" width="500" height="410" codebase="http://go.divx.com/plugin/DivXBrowserPlugin.cab">
<param name="mode" value="full" />
<param name="autoPlay" value="false" />
<param name="src" value="{param}" />
<embed type="video/divx" src="{param}" mode="full" width="500" height="410" autoPlay="false" pluginspage="http://go.divx.com/plugin/download/">
</embed>
</object>