0h4kyz1vxvlrwdmh724z6_source.mp4 -

Uploading a screenshot of the video to an image search tool can often link it back to the original research project or project page. Can anyone tell me where media player finds video file name

The structure—a long alphanumeric string followed by _source —is typical for:

Systems that store assets using hashes or UUIDs to prevent filename collisions. Contextual Possibilities

If this file was found in a GitHub repository or a specific dataset folder, the associated README or bib file will list the "useful paper" you need.