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This specific formatting (Date + File Type + Duration) is often used by automated systems like CCTV or digital asset management tools used by libraries and researchers for archiving historical footage.

"0103" could be a date (January 3rd) or a sequence number, while "mp4" is the common video file format. The "42:19 Min" likely indicates the total duration of the video (42 minutes and 19 seconds).

If you found this in a list of notes or a transcript, it might be pointing to a specific moment starting at 42 minutes and 19 seconds within a file labeled "0103."

To give you the best guide, could you tell me ? For example, was it in a history lecture, a security log, or a specific online archive like the Internet Archive?