Many CCTV and dashcam systems auto-save clips using these alphanumeric codes.
If you found this in a random email or a suspicious link, be careful! Don't open or download .mp4 files from sources you don't trust, as they can sometimes be used to hide malicious scripts. g7228.mp4
Sometimes files shared in private servers or group chats get renamed into these strings during the upload process. Many CCTV and dashcam systems auto-save clips using