Changing transparency of lightbox background

Hey Dave,

One approach would be to create a "psuedo lightbox." 

Put your video on a single slide in it's own Scene. Since you're already using a lightbox slide to access from anywhere in the course, simply use the same slide. Then to Geert's suggestion, create a shape the same width and height of the slide. I do this often and use solid black with no border. Place it at the top most position in your timeline just behind the video. Then set the transparency to your liking.

The only challenge is with navigation. Getting "to" that slide is the easy part. Knowing where users were when they arrived will require a few variables to track whereabouts. So when users leave the video "psuedo lightbox" they return to the where they were.