Can be opened using the Movies & TV app, VLC Media Player , or by installing the HEVC Video Extensions if the video was recorded in High Efficiency mode.
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
Since it is a QuickTime movie, it is compatible with most modern media players: