20181006_000856.mp4

If you are looking for a associated with this file, could you tell me:

you saw the file name? (e.g., a specific subreddit, Discord server, or 4chan thread) 20181006_000856.mp4

I can then help you track down the context or backstory of that specific clip. If you are looking for a associated with

in the video? (e.g., a specific person, location, or sound) a specific subreddit

: Many users upload raw clips to platforms like YouTube or Twitter without renaming them. These can range from mundane family clips to concert footage.