: A screen recording of a specific app trick.

: This is a Unix Timestamp . It translates to Sunday, February 28, 2021, at 8:02:51 PM UTC .

Without more context, I can't play the video or tell you exactly what "helpful feature" it demonstrates. However, these types of filenames usually break down like this: : Often a user ID or a specific device/event code.

If this video was meant to show a "helpful feature," it might be related to:

: Popular "life hack" videos often use these identifiers.

Could you describe or where you found the file ? I can help you figure out how to use that feature yourself!