IE – Embedded YouTube on Page Overlaps Lightbox

Take a look at this

Flash content displays on top of all DHTML layers at Adobe for details.

To work around this issue you will need to add something like the following to your <param /> and <embed></embed> tags:

Thanks for that.
After following those resources, I came upon the solution for youtube’s new iFrame embed code.

I simply had to append ?wmode=opaque to the end of my url string.