Nvr is 192.168.0.XX
Ipv4 is 192.168.188.XX
Assuming your network is set up as a standard /24 (subnet mask 255.255.255.0), the 192.168.0.x network cannot talk to the 192.168.188.x network.
You will need to update either device so that the third octet in the IP addresses match (192.168.
0.x OR 192.168.
188.x).
Another option would be to change your network to a /16 (subnet mask 255.255.0.0)...that would allow anything on the 192.168.x.x networks to talk to each other...this would possibly affect your other network devices and require config updates/reboots depending on if/how DHCP is deployed.
EDIT: On another assumption, if you are trying to connect to the IP addresses of the cameras directly (instead of through your NVR) with your laptop, you would need to update your computer to the network your cameras are on and connect your laptop to the LAN/camera ports of the NVR and reach them that way. usually your WAN/Network port of your NVR will be on a different network than your camera's, and will not forward your network connection directly from the WAN/Network port.
As an example:
My NVR has 16 ports/channels for my camera's.
On those 16 ports, the NVR will hand off an IP address on the 10.1.1.X network.
If I want to connect directly to the camera on port 1 (say it has an IP address of 10.1.1.20), I would have to give my laptop an IP of 10.1.1.X and plug it into an open camera port (lets say 16).
So with my laptop connected to port 16 on the NVR, I could connect to the camera on port 1 by opening Internet Explorer and putting this address in
Alternately...
The network port on my NVR is 192.168.1.108, and my home network is 192.168.1.x.
I can have my laptop on my home network with an IP address of 192.168.1.166.
So to connect to my NVR I open Internet Explorer and enter the address
This will let me log into my NVR...from here if I go to the camera registration page, you should see an Internet Explorer icon in a column to the right that you can click to log into the cameras.
When interfacing with the NVR or cameras through Internet Explorer, you will need to install the plugins when prompted, otherwise it won't let you see the video stream.