: A standard MP4 video should be several megabytes (MB). if the file is only a few kilobytes (KB), it might be a shortcut or a malicious script.

: Before opening, upload the file to VirusTotal to check for hidden threats.

When downloading files with cryptic names like "mp4" hashes:

: Never enter your password or phone number to "unlock" a download for a file with this name.

Most files with these naming conventions are generated by a specific platform.