: When devices sync to the cloud or export data, they often use a UUID to ensure that no two files have the same name, preventing data overwrites.

: Since it is a .MOV, the best player to use is Apple QuickTime. On Windows, you can use VLC Media Player or the default "Movies & TV" app.

: You can safely rename the file to something more descriptive (e.g., "VacationVideo.mov") by right-clicking it and selecting "Rename".

: This is a QuickTime File Format (QTFF) developed by Apple. It is a "container" that holds video, audio, and text (subtitles).