Looks like you need to start up 2 copies of the game to play both the video cams and the guy in the room. From what I could tell, the video cams player can press the arrow keys to ping the other player's screen with directions, but I couldn't figure out how to switch between different video cams. Also, the video cams person seems kind of useless at first glance since you can still kind of see as the person.
Edit: Played this again with the knowledge of how to change the cams. It's super difficult to navigate as the person even if you're also controlling the cameras due to the lights only being on for short periods of time. The game is very well presented though. Really enjoy the atmosphere and the environment looks really nice. Very well done.