... just adding my experience using an HDMI splitter/extender (mentioned in the other threads posted by
wittaj above)
I use an HDMI splitter/extender (this one:
) that transmits video over UTP cable to small receivers. The UTP cable has to be terminated using the T-568A or B standard, but the cable is a mechanical connection - like a really long HDMI cable. (I think that is how it works. I do know that the video is not being transmitted as ethernet data packets.)
This is a little wordy, but my BI server is a "workstation" motherboard with a Xeon E3 processor with integrated graphics, so I use that for BI Intel video decoding. I also have an Nvidia GTX 750ti installed (decent low-power performance) which I have the HDMI splitter attached to. I am not sure if any of the flavors of Windows 10 allow it, but I use Windows Server 2019 which allows multiple users to be logged in, so I have BI running under the
Administrator account (accessed from Remote Desktop), and then I have a
Camera_User account logged in locally to the server using the Nvidia card. Under that
Camera_User account desktop I have a web browser running UI3 full screen, which is what is sent to all the HDMI receivers from the splitter.
I have dual networks according to the forum "best practice": one for cameras and one for devices that need Internet access, with BI server's dual NICs as the divider. One advantage I believe I gain from the HDMI splitter is that I have four streams of high resolution (well, 1920x1080 anyway) video that have no impact on either network's traffic.
With the particular splitter in the link above, the transmitter is powered and the receivers are powered over the
Cat5e cable. That might make a difference to your installation. Maybe not a real advantage since the TV needs power from mains anyway.
Off the top of my head I can think of a couple limitations or unknowns. All of the TVs see the same UI3 display/configuration, and I currently don't have KVM's or any control except from the console. Also, I have no idea how long cable runs would affect the video quality. The TV with the longest cable run is only around 120 feet away (maybe less).