If you can take a screenshot of a clear frame from the video, use Google Lens or TinEye to find the original thread.

If you recently downloaded it, check your Reddit "History" or "Saved" tabs in your profile.

The filename is a unique identifier typically generated by Reddit's video hosting service (v.redd.it) .

Since the filename is an internal server ID, there isn't a public "directory" to look it up. However, you can try these steps to find the original post: