Assuming you're using windows (i don't remember *nix having this problem): - open cmd (Win+R, type cmd, press enter) - navigate to the folder containing the f

Assuming you're using windows (i don't remember *nix having this problem): - open cmd (Win+R, type cmd, press enter) - navigate to the folder containing the file: cd c:\Movies - type move filename.mp4 c:\newfilename.mp4 now the filename is short