A video mirror system suitable for use in a vehicle includes an interior rearview mirror assembly mountable at an interior portion of a vehicle and includes a mirror case and a reflective element. A video display device may be one of (i) fixedly disposed in the mirror case and (ii) extendable and retractable relative to the mirror case. The video display device is operable to display video images that are viewable by the driver of the vehicle when the interior rearview mirror assembly is mounted at the interior portion of the vehicle. The interior rearview mirror assembly includes an on-screen display controller operable to receive a video signal from a camera and, responsive to receipt of the video signal, the on-screen display controller is operable to generate a video feed to the video display device.