Share an hdmi display between four distinct hdmi audiovideo sources with optional picture and picture the vs421hdpip 4 port hdmi video switch with picture and picture pap lets you connect four hdmi video sources to a single hdmi display with the added benefit of playing all four video sources on your display simultaneously with combined video the split screen multiplexing switch gives you the flexibility of a 4 port video switch with the added benefit of combining two three or four vid