: It may be a "creepypasta" or Alternate Reality Game (ARG) video designed to look like a leaked or "found footage" file.
Usually, when I see a raw .mp4 name like that, it's just someone's accidental upload from their phone. To help me give you a proper review, could you tell me: did you see or hear about this video? 17431.mp4
Numeric file names are a common tactic for distributing "shock" content or inappropriate material. Community Perspectives : It may be a "creepypasta" or Alternate
Since this specific file name isn't linked to a famous work, people often have different experiences with similar "numbered" files: 17431.mp4