: Use a tool like Mediainfo to look at the "Encoded date" or "Writing library." This can tell you exactly what kind of device (e.g., a Sony camera or a specific software) created the file.
If you have this file or saw it referenced, here is how you can dig deeper into its origin: Ajb06439 mp4
: Look at the directory or website where you found the name. Often, the surrounding files (Ajb06438 or Ajb06440) provide the context—such as a specific date or location—needed to solve the puzzle. : Use a tool like Mediainfo to look