Anime music videos (known as AMVs) hold a peculiar place in American culture - they are arguably (in some cases more than others) flagrantly illegal and unfair uses of copyrighted material, yet are tolerated, even tacitly endorsed, by the copyright holders. This endorsement does not even come with any kind of control or regimentation, as it might in other fan circles. By a fortuitous mix of the original Japanese artists' treatment of copyrights and fan-made material (rather than simply Japanese copyright law), and the domestic anime market's existence and continued life and being owed to the loyal and proactive fanbase, AMVs are allowed to thrive. Their only tangible opposition (and not much at that) comes from the music industry's reluctance to allow songs to be distributed wholesale over the internet. Yet so far, AMVs as whole have been allowed to give people an artistic outlet in the manipulation of media that would normally be protected.

"Gainax: Past, Present and Future." Anime Tourist. 18 August 2002
In 2002, American website Anime Tourist conducted a convention interview with two of the founding members of the respected Japanese anime production company Gainax, Hiroyuki Yamaga and Takami Akai. The two discuss their current and upcoming projects at Gainax, provided some details on their past at the company, as well as explaining some of the themes and such of their more famous works. Finally they speak on American localization of their works and American fandom.

An audience member asks the creators for their opinion on the music videos made from their work by American fans. Akai seems not to have been aware of them (the translation perhaps makes it a bit confusing), but Yamaga appreciates the fan-made works. He discusses the often-pointed-to model of manga and anime creators getting their start in the industry by writing and drawing dojinshi, or unlicensed fan comics based on copyrighted properties: "as Gainax, they got their start doing similar stuff so it's very hard for them to say, ‘No, We won't allow that.'" As a company, they have to plead ignorance that such fan material exists or else even Japanese copyright law would dictate that they shut infringers down. He points to the line between fan/hobbyist and professional as the deciding factor in whether or not infringing work is worth going after legally; in the Japanese manga business, the line is extremely blurred as young artists very often earn their stripes and build their skill on dojinshi before tackling original projects of their own. Japanese creators such as these may not be aware of the American arm of fan's use of their characters and work, but they are used to letting such forms of use slide within their Japanese fan culture.

Lessig, Lawrence. ""Creatives face a closed Net." 28 December 2005
Lessig writes about the recent development of a record company, Wind-Up Records, requesting AnimeMusicVideos.org (perhaps the largest online collection of anime music videos and "AMV" artists) to remove all links to music videos containing music by their artists. These artists included Evanescence and Creed, bands popular among fans and with a large number of music videos on the site, roughly 3,000. He points to the AMV movement as a sign of the growing read-write culture allowed by the internet and computers that new generations are increasingly participating in. Where content owners try to enforce a "Read-Only" environment where viewers/users can look, but not touch, Lessig advocates the development of creativity and benefits thereof for those (often young) fans who take it upon themselves to add to the artistic tableau of a medium. He even relates a personal anecdote about his son, in which the only way he was accepted to a prominent university was by showing them the AMVs he had made as an example of his artistic talent. Lessig sees the struggle between copyright holders and young, artistically motivated fans as the new battle to be fought, and one in which it should be easy to see which side is in the right. Of course, according to current US copyright law (backed by copyright holding corporations) such employment of "Read-Write" culture is illegal. The internet, however, has afforded both an opportunity to put such artistic expression on easy display and an at least temporary hurdle for content owners to leap in order to stomp down on "unfair" uses due to its expanse and level of anonymity.

Wikipedia definition of AMV with some links to AMV sites.