In many years, December 21 is the Winter Solstice; the video might feature specific lighting or astronomical events related to the shortest day of the year.
Right-click the file and select Get Info . Look under "More Info" for dimensions, codecs (usually H.264 or HEVC), and duration. Video Dec 21, 10 09 54 AM.mp4
If you are looking for the technical specifications of this specific file, you can find them by: In many years, December 21 is the Winter
Right-click, select Properties , and go to the Details tab. In many years
If you are asking about a specific software feature that generated this video:
If you saved a Live Photo as a video, it often adopts a timestamped name similar to this. 3. Contextual Content
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