As standard: motion by zone, bookmarks, search by date and search by object fed with whatever metadata the cameras or the plug-ins send. That handles the day to day: finding the moment something changed.
What you add: analytics inside the camera and server plug-ins —number plates, line crossing, abandoned object, counting— which come in through the metadata kit and land on the same timeline.
The ceiling, the same as in nearly all video software: the analytics included answer «something has happened in this rectangle», not «what is happening». A few rules about movement do not tell the worker bending down to tie a shoelace from the one who has fallen over, and the price is paid in false alarms until the operator stops watching.
And it is time to say where we come from: in the same house there is IRIS Neural, the NVMS from Infinity Neural —the other company in the group, so we recommend it with an interest of our own and we say so first—. In many installations they live together: the VMS governs cameras, recording and retention; IRIS brings the understanding of the scene. With Nx living together is one of the easy cases, because the streams are accessible and both systems look at the same image without duplicating cameras.