So on the Dahua branded NVR's with built-in POE ports, under the "Registration" tab you can access the cameras direct by clicking on the blue "IE" icon. The NVR switch assigns the cameras a 10.0.X.X address. (see image below)
I'm no network guru, but If you were to plug your laptop into the router and change the IP range to the same as the cameras (the 10.0.X.X range) and you know the IP address of the cameras, you should then be able to connect to them directly. Currently your computer is on the 192.168.X.X range so it can't communicate directly with the cameras unless your NVR has the feature shown below. I think some of the Lorex and other rebranded equipment disable and/or dumb down key features of both cameras and NVR's..