I think this issue has been mis-diagnosed. I could be wrong. Unfortunately, I don't really know the backend of prettyphoto or lightbox. I try to leave all the major code to you code lovers.
What I do know, is that I would like for my videos files to pop-up like the demos on this page (http://www.tipsandtricks-hq.com/wp-affiliate-link-manager/wp-lightbox-ultimate-demo-73)
With "WP Lightbox Ultimate" activated, my mp4 videos pop-up but an extra box pops up also and complains that the image can not be found. This error has been traced down, by tipsandtricks Techsupport, to my themes prettyphoto. I don't know if they are correct.
Removing the code above as instructed fixes the extra pop-up box and error but fancy images shortcode doesn't work anymore.
What would be the best way to implement the popping up of video in a lightbox utilizing my own hosting server to host video files?
Currently I have the "WP Lightbox Ultimate" plugin activated and put the code that was removed from custom.js back in. You can view this issue here http://vmseven.net/?page_id=183