38495-60 601531470826_sub_f_1532160055.mp4 -

: This usually stands for " Sub-stream " or " Sub-file ." In surveillance, a "Sub-stream" is a lower-resolution version of a video (e.g., VGA or 720p ) used for remote viewing or mobile playback to save bandwidth, while the "Main-stream" records in Full HD or 4K .

If you have this file and cannot open it, it may be due to a proprietary codec used by a security system. To view it, try: 38495-60 601531470826_Sub_f_1532160055.mp4

: Likely a unique database ID or a long-form timestamp. : This usually stands for " Sub-stream " or " Sub-file

Are you trying to a lost video file with this name, or Are you trying to a lost video file

: This is a Unix Timestamp . It represents the number of seconds that have elapsed since January 1, 1970.

The string appears to be a specific system-generated filename for a video recording, likely originating from a surveillance system, body camera, or automated backup service.