0h4kyz1vxvlrwdmh724z6_source.mp4 [4K – 2K]

Platforms like Mux , JW Player , or Vimeo that assign unique IDs to original uploads (the "source" file) before transcoding them into various qualities.

The structure—a long alphanumeric string followed by _source —is typical for: 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. Platforms like Mux , JW Player , or