Do not you just have a single HDTV? This is no problem with the video matrix!
PS420 Home Cinema Video Matrix gives you the convenience of connecting four separate HD video sources to two HDMI or DVI-compatible monitors and switching between them. The audio data is not too short. With the PS420's built-in S / PDIF digital audio output (coaxial & optical), you can also connect a digital audio cable to an audio system. Thanks to the matrix function, you can connect two HDTV devices (or beamer) to up to four source devices. Both output devices can simultaneously use different input source devices individually.
Video Matrix Switcher with 4x HDMI In and 2x HDMI Out + Audio Out
High Speed HDMI for UltraHD resolutions up to 4K / UltraHD / 2160p at 30Hz
Audio Return Channel (ARC) and digital audio output (Optical and Coax)
Incl. IR remote control for easier operation
Lossless transmission according to the latest HDMI standard