If the video is from a public source, you can take a screenshot of a clear frame and use Google Lens to find the original post.
Discord, Twitter (X), or Reddit often rename uploaded videos into similar alphanumeric strings. 0gz36a20ya1f4i33pgu61_source.mp4
Direct download links from services like Google Drive or Dropbox sometimes use internal IDs in the filename. If the video is from a public source,