wow. I've been messing with this for days now and tried so many things. Is there someone I can pay to solve it with the constraints I mentioned?
Here is the challenge:
while everything is powered on and working, connect an uncharged capacitor, motor, or any other device that draw significant current to terminal A, with any additional components, such that the video feed does not flicker. You cannot change the wiring. Everything shares a ground as illustrated including the ground portion of the video feed.