The "52" suggests it is the 52nd item in a series, likely generated by a surveillance system, a dashcam, or a bulk video downloader (like those used for YouTube or TikTok playlists).
If you did not personally download or record this file, do not open it. MP4 files can occasionally be used in "pixel-stacking" or "buffer overflow" exploits to hide malware. mm.52..mp4
If you have encountered this file on your device or in a shared folder, consider the following: The "52" suggests it is the 52nd item
Files with these abbreviated, non-descriptive names are highly common on encrypted messaging apps like Telegram or Discord , where users upload media quickly without renaming them. Safety and Usage Advice likely generated by a surveillance system