You tube video / menu appears on top, everything else behind

Lightbox / Thickbox / Menu disappears behind flash you tube video [fixed]

* Straight after the Object tag of your video code, place the following snippet:
<param name="WMode" value="transparent"></param>
* Just before the type=”application/x-shockwave-flash” place the following code:
wmode="transparent"

Courtesy: http://www.voodish.co.uk/articles/lightbox-thickbox-menu-disappears-behind-flash-you-tube-video-fixed/