: A sequential serial number assigned by the app to distinguish it from other videos saved on that same day. .mp4 : The digital container format used for the video. Why you might be seeing this
: You found this file in your phone’s storage or a cloud backup and are trying to identify what it contains. VID-20201219-WA0370mp4
: You may have seen a link or a mention of this filename in a group chat or a forum where someone shared a video without renaming it. : A sequential serial number assigned by the
Since the filename itself contains no descriptive data about the video's content (such as "Birthday Party" or "News Report"), the only way to know what the "topic" is would be to: VID-20201219-WA0370mp4