, and are there any other files in the same folder with similar names?
This specific naming convention—starting with double underscores followed by a mix of letters and numbers—is typical of: __HDbb14014.mp4
: It may be a unique identifier from a personal cloud storage backup (like Google Photos or iCloud) or a private server. , and are there any other files in
: Many security cameras (CCTV), dashcams, and bodycams use alphanumeric strings to catalog clips by date or device ID. __HDbb14014.mp4
: Some messaging apps or video editing software generate temporary file names like this while downloading or rendering content.