If you are asking about a specific software feature that generated this video:
If "proper feature" refers to what is happening in the video, the timestamp suggests it may be related to: 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: If you are asking about a specific software
If you saved a Live Photo as a video, it often adopts a timestamped name similar to this. 3. Contextual Content Video Dec 21, 10 09 54 AM.mp4