A few days ago my WP Video Lightbox plugin started behaving strangely. Up until then (for over a year now) it has worked just fine. But a few day, when I would click on a link to view a video, it would open the lightbox as normal, but instead of loading the video, it would then kick out to a mostly blank white page.
I have no idea what changed. I've got the 1.6.3 update running on WP 3.7.1
See example Here. (Click on "Video" button in middle of screen)