That filename, , follows the specific naming convention used for raw video assets hosted on Reddit .
When a user uploads a video to Reddit, the platform’s back-end (via its content delivery network or "v.redd.it" service) assigns it a unique alphanumeric identifier. The suffix _source indicates that this is the original, highest-quality version of the file before it is transcoded into different resolutions for various mobile and desktop playback speeds. What this file represents: 0h1hko8mvex7pzkncx0ol_source.mp4
Because these IDs are randomized, the filename itself doesn't describe what is in the video (e.g., a cat video, a news clip, or a meme). How to find the original post: That filename, , follows the specific naming convention