Youtube video showing on top of JS lightbox

I've got a Youtube video embedded on my webpage and there's a link below the video which brings up a JavaScript lightbox.

When the lightbox appears, it app开发者_JAVA百科ears over the lightbox.

Any idea why this is?

The iframe has wmode="transparent" in the parameters which I thought would solve the issue.

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Did you try and add wmode="transparent" to the embed and not just the iframe?