Use a tool like MediaInfo to check the file's metadata. This can reveal the creation date, the software used to encode it, and sometimes the original title or author.
If you found this on a specific forum or database, look for a "hash" (MD5 or SHA-256). Searching for the hash string is often more effective than searching for the filename itself, as filenames are easily changed. M3N-Th30Br&Chr15C.mp4
This specific naming format—using hyphens and ampersands to join names—is a common hallmark of files found on Usenet, IRC channels, or older torrent trackers. These files are often related to niche archival footage, private recordings, or specific project collaborations. Use a tool like MediaInfo to check the file's metadata