A video mirror system includes an interior electrochromic rearview mirror assembly mountable at an interior portion of a vehicle and a video display screen disposed to the rear of a rear portion of a reflective element. The video display screen emits light when actuated that passes through the transflective mirror reflector of the reflective element to be visible to a driver of the vehicle viewing the front portion of the reflective element. A camera having a field of view rearward of the vehicle is mounted to the rear of the vehicle and, during a reversing maneuver of the vehicle, a video output of the camera is displayed by the video screen so as to assist the driver in reversing the vehicle. The video display screen is operable to display at least one of (i) an instruction, (ii) an icon, (iii) a character, (iv) a symbol and (v) an indicia.