title: use HTML <video> tag if supported else use lightbox??? (script)
body: <p>is it popular to have a page display video using the new HTML  tag (as long as its supported by the browser), else fallback to using a lightbox???  [ &amp; maybe even have another fallback??]</p>
  
  <p>i've never had to do anything like this so i don't know.  would appreciate any suggestions</p>