[2020] Bridge (powered) how do i connect camera and pressure plate to work with it?

Any electrical object can only recieve one Input line, but can put out a number of Output lines. IN order to do what you want you need to wire the camera to the plate to the door (Or plate camera door) -- Note there cannot be anything in the line between the plate and camera or else the first in line will determine if the next one functions. When they're both wired directly together (Read: No relays) they should both be capable of powering anything down the line, in this case, the door.