This is preview!
I use no video on my site and am not sophisticated enough to really understand what's going on here but it seems related to the bug report:// HACK : override appendChild, replaceChild, insertBefore for IE, since it doesn't support DOM events
var appendChildOriginal = doc.body.appendChild;
doc.body.appendChild = function(element)
var tag = element.tagName.toLowerCase();
if ("video" == tag)