QuickTime Videos.

Basic code:
<object classid="clsid:02BF25D5-8C17-4B23-BC80-D3488ABDDC6B" codebase="http://www.apple.com/qtactivex/qtplugin.cab" height="256" width="320">

<param name="src" value="http://www.yourdomain/your.mov"&gt;
<param name="autoplay" value="false">
<param name="type" value="video/quicktime" height="256" width="320">

<embed src="http://www.yourdomain/your.mov&quot; height="256" width="320" autoplay="true" type="video/quicktime" pluginspage="http://www.apple.com/quicktime/download/"&gt;

</object>