This filename appears to be a typically used by Content Delivery Networks (CDNs), cloud storage platforms (like Google Drive or Dropbox ), or social media servers to track specific video uploads. Because these strings are randomized to prevent file collisions, they usually don't appear in public research papers or searchable databases unless they were part of a specific leaked dataset or a technical forensic report. 0h4kgp966jsegyolgd3sm_source-KH2UPNvF.mp4
If you are looking for information regarding the of the video or the platform it came from, could you describe what happens in the video or where you found the link?