[plugin: NGG VIDEO EXTEND] Shadowbox not working properly in IE8?!

Hi,

I have NGG gallery with NGG Video Extend installed on a website I’ve been working on. On Firefox, Safari & iDevices the shadowbox is working
as whished, but in IE8 it sometimes works & sometimes it doesn’t. It sometimes just opens the image, but not the video..

You can see the website at https://www.allstreamlifestyle.nl/portfolio/
On the first page it probably works for you too, but if you go to the second page and then back to the first, it then just opens the image and not the video.