Temporary files from sites like YouTube or TikTok often have similar "scrambled" names.

If your default player fails, use VLC Media Player which supports almost every codec.

If you double-click the file and it asks for "admin permissions" or tries to install something, cancel immediately .

Use the Adobe Express Converter or VLC's Convert/Save feature to re-encode it into a standard MP4.

Where did you (e.g., a specific folder or a website)? What happens when you try to play it ? Are you trying to recover it or delete it safely? How to play MP4 files in Windows - Microsoft Support

MP4 metadata can include GPS location and device info. Be careful before sharing it online. 🔄 Converting or Fixing the File If the file is corrupted or won't play: