_vid-1615646442863blbon1mp4

If this file is in a cloud storage folder (like Google Drive or OneDrive), it likely represents a memory from 2021 that was backed up from a mobile device [2]. It is safe to move, rename, or delete, depending on whether you want to keep the media.

Rename the file from _VID-1615646442863blbon1mp4 to _VID-1615646442863blbon1.mp4 . _VID-1615646442863blbon1mp4

If renaming it does not work, the file might be corrupted or only partially downloaded. If this file is in a cloud storage

The .mp4 extension is missing the dot ( . ) before it. This can prevent it from opening automatically. 2. How to Open the File _VID-1615646442863blbon1mp4