Many devices use Unix timestamps (the long string of numbers) or internal database IDs to name files to ensure every clip has a unique identity.
If you plug that number into a Unix Time Converter , you can find the exact second the video was created. For example, 1678561465 translates to . 3. 3 Steps to Clean Up Your Video Library 73691-_1678561465.mp4
The string appears to be a raw file name, likely generated by a digital camera or an automated export system. Because the name itself doesn't refer to a known viral video or specific public event, the most "useful" blog post on this topic would be a technical guide for people who have encountered similar cryptic file names and don't know how to handle them. Many devices use Unix timestamps (the long string