This is the device he is using for video over etherenet.

Basicolor HDMI KVM USB Extender 4K@60Hz KVM Extender Over Cat5e/Cat6 Up to 60m (196Ft), 4 Ports USB,Lossless or Zero Latency, Plug&Play(Point to Point KVM Extender) https://www.amazon.com/dp/B099F2T3MS/ref=cm_sw_r_apan_i_CM1H53N85GS4PQRM7DHT