WWW.AnimeMusicVideos.org - Prime download source for videos good, bad, and cheesy, as well as information on how to make them yourself.
Maboroshi Studios - Check his work out! He's my favorite producer! Just plain classy and professional! My faves are "Fly," "Far and Away," and "Loved By The Sun"
Aluminum Studios - His timing and cuts are perfection! Must sees: "Venus In A Bottle," "Torn," and "Blue Mercury." Hurry and download his work now. He's closing his site soon and then you'll have to pray someone else is hosting his videos in order to see them.
NightOwl Pictures - Another award winning studio. Check out "Love is Flowers," "Perfect Afronova," and "Die Another Day!" He's particularly good with lipsyncing.
WWW.AnimeMusicVideos.org/Guides - You want to make a video? These guides will tell you everything from how to put it all together, from how to rip a DVD or CD-ROM to how to cut those annoying subtitles out and how to lip sync. You want to do it? Then they have a guide here that can tell you how!