HTML/CSS/Object Attributes/dynsrc
"dynsrc" specifies the URL of a video clip
<HTML>
<BODY>
<img start="mouseover" dynsrc="yourvideoclip.avi" alt="">
</BODY>
</HTML>
<HTML>
<BODY>
<img start="mouseover" dynsrc="yourvideoclip.avi" alt="">
</BODY>
</HTML>