: Often signifies the recording type, such as "File" or "Full" (continuous recording).
: Lower resolution, designed for remote viewing on mobile devices or multi-screen grids to save bandwidth. 38499-70 701531471561_Sub_f_1532161730.mp4
: A unique identification number, often the serial number of the recorder or a specific event ID. : Often signifies the recording type, such as
: A Unix Timestamp . This number represents the exact second the video was recorded. Converted Time: Saturday, July 21, 2018, 08:28:50 AM (UTC) . Key "Feature" : A Unix Timestamp
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 specific camera group code.
: Stands for Sub-stream . Security systems record in two modes: Main-stream : High resolution for playback and storage.