While I don't have ClearTouch RL500 at my buiIdings, we have BirdDog P200's which my stake purchased as the FM group was only providing an HDMI/SDI PTZ camera, with just a cable hanging down from the camera and a remote to adjust and this just wouldn't work for us. After some pushing they finally sent a model that had NDI which went into one of my other buildings, but its not the ClearTouch.
We have our cameras wired with POE so that they are powered without the FM group needing to have power run nearby. We also have the camera tapped into the chapel audio so that it pulls in the audio from the pulpit or any XLR in the room. We utilize the NDI Tools and use the NDI Webcam Input app to choose the camera and then in Zoom select the NDI Video and Audio feeds to pass those to Zoom. I would suggest that you also change the audio settings to make sure you can use original audio as zoom does drop a lot of audio and it just sounds more robust with original audio.
Currently I have left it open to allow anyone with the software to be able to access the camera, but in the near future with a setup of computers each Ward is purchasing for streaming, it will then be locked down to only allowing those machines to access the cameras.
In terms of lag/latency, we only experience about a half a second if not less, depending on the amount of traffic on the network. When it comes to Stake Conference, we turn off the Liahona wifi to decrease that issue. I utilize OBS for managing my cameras and then use the plugin obs-ndi (which has been renamed to DistroAV) to be able to provide a program feed back out to NDI which I then use another machine to handle the Zoom feed to not make one machine handle everything. It has worked really well for us.
