An interior rearview mirror assembly for a vehicle includes a minor head pivotable about a minor support, which is configured to attach at an interior portion of the vehicle. The mirror head includes a mirror reflective element having a transflective mirror reflector that at least partially reflects light incident thereon and at least partially transmits incident light therethrough. A video display device is disposed behind the minor reflective element and includes a display screen backlit by a backlighting device, with the backlighting device including a plurality of micro-LEDs. With the minor support attached at the interior portion of the vehicle, the video display device is operable to display video images captured by a camera of the vehicle, whereby light emitted by the video display device passes through the mirror reflective element for viewing displayed video images.