Do Ethernet over HDMI injectors exist and if so what are they called? - Super User
DisplayPort vs. HDMI: Which is Better?
Amazon.com: HDMI Extender Over Cat5e/6, RJ45 Ethernet Splitter to HDMI 2 Ports Network Adapter 2 Pack, Support 1080p UP to 30m/98ft Video and Audio for HDTV HDPC PS4 STB : Electronics
Cable Builders High Speed HDMI with Ethernet Cables
Manhattan 1080p Compact HDMI over Ethernet Extender Kit (207539)