32 (364).mp4 -

: This is a copy suffix . When you download or move a file into a folder that already contains a file with the same name, Windows or macOS adds a number in parentheses to prevent overwriting the original. In this case, there have been 364 previous versions of "32.mp4" detected in that directory.

: This is often the original name given to the file by a device (like a dashcam or digital camera) or a user who simply used numbers to organize a series. 32 (364).mp4

Could you provide more context on or what the video contains so I can help you identify it? : This is a copy suffix