Bug Youtube / Menu

Hello,

With Internet Explorer, on the homepage of my site (http://www.sydev.com/), when I click on a video, a pop-up opens to play the video. When I close this pop-up and I click on the menu, it returns me on the page youtube previous view in full screen.

Thank you for your help.