I've been working on this code - and it works in Safari but now in Firefox :(
<table border='0' cellpadding='0' align="left">
<!-- begin video window... -->
<tr><td>
<OBJECT classid='clsid:02BF25D5-8C17-4B23-BC80-D3488ABDDC6B' width="600"
height="338" codebase='http://www.apple.com/qtactivex/qtplugin.cab'>
<param name='src' value="http://blog.courtneylindberg.com/wp-content/themes/prophoto3/movies/cl_withtitle.mp4">
<param name='autoplay' value="true">
<param name='controller' value="true">
<param name='loop' value="true">
<EMBED src="http://blog.courtneylindberg.com/wp-content/themes/prophoto3/movies/cl_withtitle.mp4" width="600" height="338" autoplay="true"
controller="true" loop="true" pluginspage='http://www.apple.com/quicktime/download/'>
</EMBED>
</OBJECT>
</td></tr>
<!-- ...end embedded QuickTime file -->
</table>