This is for documentation.
If you have a REOLink NVR you can update your firmware to this version or later and pull static JPGs from your cameras. They can be displayed as an image on the Dashboard.
To get the image you should create a non-admin user on the NVR and use a URL similar to this one:
The channel number starts with 0 - so Channel 1 on the NVR is channel=0 in the URL.
Here is the proof!