files won’t open in the live movie maker

I have completed simple video editing and have watched the final videos, but now, perhaps b/c I moved the files/renamed the folders, the video clips can't be found. Error message states: The file is missing. 

I know where to find the clips by the name of them and by going into the search mode on the computer to find them, but this is tedious. Does this program only work when the original video clips are accessible for the computer? I want to be able to burn them to a disk and not worry about the files missing (unplayable).  Will videos not play unless attached to the original files on the computer?

Thanks all!

G