NVR16CH-16P-2AI - any tutorials?

The video Andy linked said specifically that SMD is a 'filter' for MD.

Whenever I enable IVS, it triggers the alarm sound on my cameras for some reason, even though I have it unchecked as per my screenshot in the OP.

IVS is worlds better than MD with SMD filter unless you’re in a clean controlled environment (say inside a bldg)

Let’s see you IVS setting for a tripwire on the camera GUI. Triggering an alarm on IVS activation is a setting. It can be easily turned off.

What model camera exactly?
What model NVR exactly ?