A MAD is essentially a music video that either attempts to juxtapose characters from a completely different series into an existing opening video from another or use a song that was meant for something else and make a completely "original" music video with it using characters from a random series.
... Maybe it's better if I just showed you an example of a MAD instead. THE iDOLM@STER has festivals dedicated to this stuff on Nicovideo, and a lot of them are pretty amazing:
And if you're wondering, yes, they literally recorded those animations from the 360 port of the game, somehow pulled them out from the background stage, and did lots of clever tricks to make it look like that. And since Project Diva has been released into the wild, someone decided that maybe it was a good idea to apply this technique using Sega's 3D models of Crypton's Vocaloids. Hopefully events dedicated to this will start popping up more so I can talk about it later:
And with this post, I officially declare Vocaloid Week to be over. Hope you enjoyed my random discoveries.
