The .mp4 extension identifies the file as a video container. If you have encountered this file:
: File recovery programs often assign randomized names to "carved" files found on a disk when the original metadata (and thus the original name) has been lost.
Providing the source (e.g., a specific website or a system folder) can help narrow down its exact purpose. Meaning of lost filenames and dates - Forensic Focus
: Modern browsers and download managers sometimes use randomized strings as placeholders for a file while it is still being downloaded or processed. Analyzing the ".mp4" Extension
: Many operating systems, including Microsoft Windows, auto-generate lengthy alphanumeric strings for temporary folders or maintenance files to avoid naming conflicts.
: Strings like "gbhdxfrbhgrf" are often created by someone typing randomly on a QWERTY keyboard—specifically using the middle and bottom rows (G, B, H, D, X, F, R)—to quickly name a temporary file.
