Problem with a security camera that records in *.AV format (not in .avi)

The problem is that with various players installed on the Win7U PC (I have the K-Lite Mega Codec Pack installed), the .AV files play but cannot be played at a fast speed so I don't waste time browsing. When I convert them online, for example through clideo.com, fast speed viewing becomes possible.
Is there a solution to my problem without having to convert each file online?
The camera is Chinese and works with the Yoosee app. There are PAL and NTSC in the settings. I've tried both, the effect is the same.
Info from MPC:
Video: HEVC 640x360 10fps [V: hevc main L4.0, yuv420p, 640x360]
Info from PotPlayer:
[List Filters]
  (1) Built-in Raw Video Source
  (2) Built-in Video Codec/Transform
  (3) Enhanced Video Renderer(Custom Present)
[Info Video]
  Video Decoder: HEVC - Native D3D9 DXVA Decoder(VLD) - NVIDIA Quadro P400
  Enter format: HEVC(24 bits)
  Enter size: 640 × 360(1.78:1)
  Ex. format: dxva
  Ex. size: 640 × 360(1.78:1)
  Frames/sec.: 15
  BitRate: Unknown

This is a raw video stream. You need to wrap it in a container format to have fast seeking ability.

You can try the MkvToolNix application to put it into MKV container.

Does this mean I have to process every file with this kit?

Yes

Thanks, it works perfectly.