Colorbox shows: "This content failed to load"

Hey I have everything working, with Colorbox installed, right up to the point where I click on the video thumbnail and open up the lightbox. An error then displays: "This content failed to load". This happens for all video types - Facebook, Youtube, Vimeo. I can't can't seem to get around it.

Check it out here: http://romancewasborn.com/collections/its-4-cat-alley - the thumbnail right at the top.

Any ideas???

thanks