help with video replacement

[MrCoo1]

I'm trying to replace the intro for brawl with a different video. In this video it says that you should use WiiScrubber to replace the file in the brawl ISO. My question is how do I go from the brawl ISO on my computer to the wii. I use the homebrew channel with Gecko OS 1.9.0.1 to play brawl+. It also seems that you can use Riivolution to replace the file, but I have no experience with that and I don't know how to implement it with what I'm using.