If the PC and the NVR are on the same LAN and subnet you could open a browser on that PC to the NVR's LAN IP address, that should bring up the NVR's embeded webGUI.
There should then be a menu selection in the NVR's webGUI to view the video clips.
Of course, you can also view it on a monitor that is attached to the NVR by using the mouse that is attached to the NVR and navigating the NVR's menu.