[Plugin: Fancybox] Youtube links not working on in Chrome and IE

Hi There
On my website at https://www.west-racing.com/mf I am using fancybox to display my videos and images, everything was working great on all browsers but recently on Chrome the youtube links just now take you to the youtube page instead of displaying in a popup fancy box, on IE the fancybox window opens but does not display the video and just seems to lock up, on firefox everything works as expected. Can anyone offer any advice as to what has caused this to happen or how to fix it? If you visit the site the top post has a video to click on.
Chris