Jason has a science video project, as he creats his project, he saves, then comes back a minute later. the file is now unreadable by the program. how would he have the file readable by the program?

Changing the extension after the program name
Eg .docs  .gif   .jpeg

Resave the file in a correct format thats readable. You could also roll back your computer but that really isn't a efficient way to solve that problem.

Your question is also a little hard to understand

Or the file was corrupted.

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