Systems that store assets using hashes or UUIDs to prevent filename collisions. Contextual Possibilities
The filename appears to be a system-generated identifier commonly used by video processing or hosting platforms rather than a standard video from a specific research paper. 0h4kyz1vxvlrwdmh724z6_source.mp4
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. Systems that store assets using hashes or UUIDs
The structure—a long alphanumeric string followed by _source —is typical for: 0h4kyz1vxvlrwdmh724z6_source.mp4