56mp4 – Authentic

A where a number was accidentally appended.

: In large-scale financial filings, such as those found in the SEC EDGAR database , "56MP4" often appears within encoded text blocks (like UUencoded or Base64 data). In these cases, it is not a "video" but rather a fragment of machine-readable code representing internal document metadata or registration fees. A where a number was accidentally appended

While "MP4" is a ubiquitous digital multimedia container format (ISO/IEC 14496-14), "56mp4" is a recognized extension of this standard. If you encountered this as a file extension, it may be: it may be: