This specific naming convention—starting with double underscores followed by a mix of letters and numbers—is typical of:
Without more context or the ability to view the file, it is impossible to determine the visual content. If you found this file on a device or received it via message, it is likely a personal or automatically generated recording. __HDbb14014.mp4
: It may be a unique identifier from a personal cloud storage backup (like Google Photos or iCloud) or a private server. __HDbb14014.mp4
, and are there any other files in the same folder with similar names? __HDbb14014.mp4