You can limit bandwidth for video downloading of specific NVRs to save video on the total bandwidth, and thus ensuring the fluency of main features such as live view.
The NVR should be of V4.1.50 or later versions.
On the top navigation bar, select .
Click on the left panel.
Select encoding device(s) and click Edit Bandwidth for Video Downloading to set the bandwidth upper-limit for video downloading of the selected device(s).