This naming convention—a long string of numbers preceded by "document"—is typical for files downloaded from encrypted messaging apps like . Because these files are private to the chat they were shared in, they don't usually appear in search engines or public databases. To help you with this, I'll need a bit more context:
(e.g., a specific Telegram channel or a cloud drive) document_5814455686565727889.mp4
If you can describe the in the video, I can likely identify the source or provide the information you're looking for. What do you see happening in the first few seconds of the clip? This naming convention—a long string of numbers preceded