If you are unsure what the video contains, check the following:
: Right-click the file and select Properties (Windows) or Get Info (Mac) to see the file size, resolution, and creation date. Common Contexts : 762777.mp4
: Certain university courses use specific numbered MP4s for coding assignments or documentation guidelines. Safety Warning If you are unsure what the video contains,
Could you share or its file size ? That would help narrow down exactly what "762777" refers to. How to play MP4 files in Windows - Microsoft Support 762777.mp4