: This is the date the video was saved to your device in YYYYMMDD format. In this case, the video was received or recorded on January 10, 2018 . WA : This indicates the source is WhatsApp .
: If the file won't play, ensure the .mp4 extension is intact. Sometimes moving files between Android and iOS can corrupt the file header, which can often be fixed using VLC Media Player's built-in repair tools. Digital Housekeeping Tip VID-20180110-WA0168.mp4
: Short for "Video," distinguishing it from images (IMG) or audio (AUD). : This is the date the video was
Every part of the "VID-20180110-WA0168" string serves as a timestamp and identifier: VID-20180110-WA0168.mp4