Uniview NVR Recovery
Andrey Fedorov
I do not know how to open the video. Which video player and codec to use?

To open the video, you can use any video player and also install a popular set of codecs. For example, we use the K-Lite Codec Pack Mega.

Vadim Tkachuk
How many cameras does the software support?

As many as you like. The software does not depend on the number of cameras.