Since the name itself doesn't describe the content, it likely originated from one of the following:
: Right-click the file and select Properties (Windows) or Get Info (Mac) to see the "Date Created" or "Media Created." This can help you remember what you were doing when the file was saved. Vid01 (3) mp4
: Change your folder view to "Large Icons" to see a preview frame of the video. Since the name itself doesn't describe the content,
: Some basic recording software uses "Vid" as the default naming convention followed by a sequence number. How to Identify the Content Vid01 (3) mp4