Most "mystery" files like b6391.mp4 are harmless leftovers from a social media session. However, in the digital age, it is always better to be skeptical of unrecognized files.
To help me give you more specific advice, could you tell me: b6391.mp4
Avoid double-clicking the file until you've verified its origin. Most "mystery" files like b6391
(e.g., a Discord server, your downloads folder, a specific website?) in the digital age
In most cases, specific alphanumeric filenames like "b6391" are generated by . These can include:
Use a tool like MediaInfo to see the file's "true" properties without actually playing the video.