38499-70 701531471561_sub_f_1532161730.mp4 -

: Typically represents a system ID or a specific camera group code.

: A unique identification number, often the serial number of the recorder or a specific event ID. 38499-70 701531471561_Sub_f_1532161730.mp4

The filename indicates it is likely a video file recorded by a DVR or NVR security system (often associated with brands like Hikvision or Dahua ). Meaning of the Filename Parts: : Typically represents a system ID or a