Kaltura Video in Lightbox2?

Has anyone managed to get a Kaltura video playing in a Lightbox directly from the thumbnail?

The node uses a Kaltura CCK field. On this page I'd like the video to display in the same way as the image - is this supported somehow?

If not I can fudge a link manually using rel="lightvideo" as follows:

<a href="http://www.kaltura.com/kwidget/wid/_664072/entry_id/1_ghjf4lw2/uiconf_id/48501" rel="lightvideo"> Play Video </a>

but the rendered code messes up the "src=" part of the link as follows:

<embed width="590" height="390" allowfullscreen="true" wmode="transparent" quality="high" bgcolor="#ffffff" name="flvplayer" id="flvplayer" src="/en?file=http://www.kaltura.com/kwidget/wid/_664072/entry_id/1_ghjf4lw2/uiconf_id/48501" type="application/x-shockwave-flash">

The lightbox works fine without the "/en?file=" part but I'm not sure how to wrap that code around each thumbnail on this page.

Thanks for your help.