The VMS supports thousands of IP Video devices:

• ONVIF Profile S Devices  – will be automatically discovered and added in the Nx. Users will be able to see the devices on Nx Client (Desktop/Web/Mobile/Cloud). The latest supported list of Nx Witness can be found - Supported Devices  
• RTSP Streams  – can be added by users manually. The users can log in the Nx Media server via Nx Desktop Client, right-clicking on the Server icon, then select Add Devices.
• HTTP Streams – can be added by users manually. The users can log in the Nx Media server via Nx Desktop Client, right-clicking on the server icon, then select Add Devices.

To add the video or devices into the VMS, you can find the instructions here - Add an IP Camera or Video Source