What should I do when the video staggers, disconnects, or becomes unstable?
Please use VLC or other software to rule out camera issue first. Don't solely rely camera's IE interface to verify because it usually uses proprietary streaming protocol (but you can still try).
If the video also has problem in IE then there's nothing we can do. If VLC works fine, you can try different decoder in our software or different codec settings in camera, or you can try reducing channel number or other NVR loading to see if anything changes.
If all above fail, you need to study Example System and related topic to understand how can Genius Vision help on this issue.