2021-09-27_15-53-52: Video0mp4

This usually indicates it was the first file in a sequence or captured by the primary camera lens.

Software like OBS or Windows Game Bar often defaults to timestamps to prevent overwriting previous captures. 2021-09-27_15-53-52 video0mp4

Some Android file managers rename media this way when moving files between folders or SD cards. This usually indicates it was the first file

The recording started at 3:53:52 PM (using a 24-hour clock). 2021-09-27_15-53-52 video0mp4