Hi,
That was a little bit tricky to find. This camera can do a lot so make sure it is configured correct.
Test this URL.
Set stream type to rtsp_tcp
rtsp://username:password@cameraIP:554/cam/realmonitor?channel=1&subtype=1
subtype can also be 0 depending on the configuration in the camera.
Since the camera support ONVIF you can download ONVIF Device Manager and in from there get the correct URL rtsp://… to use.
-Henrik