Automated backups from CCTV or security systems often use date-stamped filenames (YYYYMMDD).
If it was downloaded, the website source or email attachment name might provide context. 20211028-2zsuc_720pmp4
Right-click the file and check "Properties" (Windows) or "Get Info" (Mac) to see the original author or recording device. Automated backups from CCTV or security systems often
Specific IDs used by file-hosting or streaming services for private user uploads. 20211028-2zsuc_720pmp4
Raw exports from video editing software or corporate webinar recordings.
This would help in developing a more specific review.