Services like iCloud or Dropbox often use this naming convention when you "Export" or download files to a desktop.
Most modern Android gallery apps and VLC can play these files without issue. 4. Why You Might Be Seeing This If you found this file on your hard drive or a backup: 2021-10-21 16.45.43.mov
The name follows a chronological format that tells you exactly when the recording started: October 21, 2021 Time: 4:45 PM (and 43 seconds) Format: .mov (Apple’s QuickTime File Format) 2. File Characteristics Services like iCloud or Dropbox often use this
Since it is a QuickTime movie, it is compatible with most modern media players: 2021-10-21 16.45.43.mov