MP4 files can contain metadata that may be altered; always scan unknown files from untrusted sources for malware. 3. Recommended Actions
Potential security issues. Since metadata can be easily changed and deleted, MP4 files are not the most secure file choice. How to Create and Open an MP4 File b661.mp4
Could be high-resolution footage from a Sony IMX661 sensor , used in industrial global-shutter cameras. 2. Technical Characteristics (Typical) MP4 files can contain metadata that may be
"B661" is a high-grade deadbolt series by Schlage . This file could be a clip from a digital video recorder (DVR) monitoring a B661 lock. Since metadata can be easily changed and deleted,
Likely utilizes H.264 or HEVC codecs for video and AAC for audio.
If this is a legal or security record, check the file's hash (MD5/SHA-256) to ensure it has not been tampered with.
If you tell me or what you expect it to contain , I can provide a much more detailed breakdown of its likely contents. MP4 files explained: How to open and use - Adobe