Amazon.com: OREI HDMI Multi-Viewer 4x1 Seamless HDMI Switch - 4 Ports, IR Remote, Supports up to 1080p, Security Camera, HDMI Switch 4 in 1 Out on Single Display : Electronics
HDMI Multiviewer Quad Screen with real time viewing and seamless switching
hdmi multiviewer | HDMI Multiviewer Switch 4x1, PORTTA HDMI Quad Multi-Viewer Seamless Switcher 4 in 1 Out with Loop, Audio Extractor to Stereo, 1080p, 5 Viewing Modes for Security Camera, Gaming Consoles
Amazon.com: 4K HDMI Multiviewer Switch 4x2 with PIP, PORTTA Quad Multi Viewer Seamless Switcher 4 in 2 Out with Toslink, 3.5mm Audio Output Support 4K 30Hz, 6 Viewing Modes, Downscaler for PS4/PC/DVD :
Looking for an HDMI multiviewer that has good layout modes or custom windows. : r/VIDEOENGINEERING
HDMI Multiviewer 4x1 1080P 60Hz Analog Audio output VGA out-BUNGPUNG
AV Access 4x1 4K HDMI Multiviewer, Seamless Quad-View HDMI Switch
HDMI Multiviewer Switch 4x1,ESTONE HDMI Quad Multi-Viewer Seamless Switcher 4 in 1 Out with Audio Switch,4K,5 Viewing Modes for Security Camera, Gaming Consoles (Multiviewer up to 4K@60Hz) - Newegg.com