A. After you press Ctrl+S to save the file, you will get a file in .WVE format. It is not a video format file, it’s the exclusive file ended with .WVE which stores memory of all related elements used. If you delete some of the original files, move, or rename them, the project file will be damaged and can’t be opened. It could only be recognized by Filmora, you can reload it by clicking OPEN RECENT for further modification.