You implied it.
Indeed, our argument here is that in the Org's country of origin, the US, AMVs are "fair use" and a court has already ruled that backing up media is not illegal.
As far as Japan goes, the possession rule which covers backups is not likely to cause you issues if you purchase the original source and back it up, which is what we advocate here anyhow. There is no way to find you if you are buying DVDs and ripping them to your harddrive. They would find you by tracking your downloads, which if you are buying source, you don't have downloads. Most of us don't even keep the sources ripped after we finish videos. So, even releasing AMVs, which arguably still fall under fair use (although I'd rather not test it), if it leads back to your place of residence, the Japanese law covers full back-up copies. Not scattered clips or finalised AMVs. Because AMVs cannot be used as a substitute for the original the way back up copies can, the law does not seem to apply to them. However, this is discussing the video. I think we have a much harder road to hoe when it comes to the music portion, because that is not often altered, and may be used as a substitute (although realistically, as Kevmaster said in the landscape thread, this is batshit insane, and no one downloads AMVs as a substitute for music. They just go download the music).