TMA au warlock goes brrrrrr

tl;dr any screens in his vicinity equate to "angles of sight" that he has, and the screens he's affecting will display what he is looking at forcefully, regardless of if they're plugged in or not
so like if he were to be standing in a store to feed on someone's fear, you might notice how all the CCTV camera screens always you in the image, and you might notice how some of the angles are quite impossible for there to be a real camera at.