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?

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.