Use a tool like ExifTool to see the "Create Date" and the software used to generate it, which can clarify if it's a legitimate personal file.
If you have encountered this file and are unsure of its origin, follow these steps: MyVideo_1mp4
Clicking it may lead to a fake login page designed to steal your credentials or trigger a malware download disguised as a video codec. How to Handle the File Safely Use a tool like ExifTool to see the