https://youtu.be/3EBYHu8H82o ← In retrospect, this is a really obvious way to make good "explaining some code stuff" videos: just set cool-retro-term to 80% opacity, and shove a low-res camera feed of your face behind it. You don't even need to faff with the VT100 bezel for this to come out well!
Bonus if you get the flipping/etc right so that you can raise a finger to point to lines of code, or what-you-will.