do you have riivolution on your sd card ? if yes just start ssbb with riivolution and it will automaticly replace the video. if you think you got something wrong or made a mistake while installing riivolution, then you should look in this guide:
http://forums.kc-mm.com/index.php?topic=12169.0 there is easily explained how to set up/use riivolution
(dont forget to get the xml files)
if you dont want to use riivolution, then you could use gecko os with the file replacement code or a usb loader with the replacement code
good luck and have fun

Demibrot