Having Trouble opening up a file in Windows Live Movie Maker

I've been working on this Video File for 2 days faithfully and all of a sudden when I save the file as its Original Name as I had been doin  the file said "Sorry Windows cannot open this file. I was advised by the Error box to Share the file with One Drive(public),which I've done twice and my Question is How an When will I be able to Reopen the File? Will I Receive an Email? ,because I was inform that if I upload the file to One Drive(Public), I would then be able to Open the File! Please Help! I need immediate assistance concerning this dilemma. I have a Deadline I'm Trying to Meet. I would Greatly Appreciate it if Someone would Promptly Assist Me Concerning this matter. Thank You! Kalome Elyon, contact me by phone if u like: 9015023603  Email: *** Email address is removed for privacy *** or *** Email address is removed for privacy ***  file name: "My Swag Up WMA"