My only input on this will be on the screen, there are much more qualified Vidiots
< no offense intended, it's like "crescent wrench", a trade name> I have extolled, on many occasions, the virtues of Tricot < Tree-coh>. It's a stretch fabric, great for front or rear projection. It's cheap, available in many colors, and widths. You might really want to suggest this to the carps building your screen. It can usually be found in the Wedding, or Undergarments department of any decent fabric store.
I'd say it sounds like you've put a lot of thought in on this project, I'd love to see a
ground plan of the set and a little more in-depth explanation as to how the video will be used in this production of the "Scottish Play".
Make a post in the new members Forum and tell us a bit more about yourself and your
theatre.