I've searched a series of forums and I've noticed that a lot of people had this same issue. I tried all the resolutions: using the longer Youtube URL like
http://www.youtube.com/watch?v=GkqS5DiF2_A
defining the width and height of the image, and I've tried using older versions of JQuery. I'm still receiving the error. I've linked all the images in the CSS file [incorrectly, but they are linked :)]. I've been trying to solve this for days and I'm not sure what I'm doing wrong.
Any help would be greatly appreciated. Thank you!
It appears that you have to add ?iframe=true
to the end of the hyperlink
https://stackoverflow.com/===>http://stackoverflow.com?iframe=true did the trick for me. Make sure you point direct to the web page you want to appear in the light box, not to the iframe.