I tried to use this once in a theatre to connect a camera watching the stage to a greenroom backstage. It worked sometimes, but was super unreliable. Latency was often several hundred milliseconds, and sometimes the image would just straight up disappear. It may be that we had bad HDMI<->Ethernet devices, but that’s the thing: It’s not a “works or doesn’t” kind of thing, it’s a “varies with the quality of all the devices in the chain” kind of thing.