Pretty much all you need is some anime, video editing software (MS Movie Maker, Avid Free DV, Sony Sonic Movie Studio, Adobe Premiere, Magix Movie Edit Pro, Ulead Video Studio, Pinnacle Studio, Roxio VideoWave) (all windows software) The only software for Mac I know of is Final Cut Pro. It's pretty much like making an animated gif, cut and pase frames, use effects to fade scenes in or make it seemless. Adobe After Effects is good for adding crazy effects to your video. Everything is usualyl different depending on thesoftware you use. I have only messed with Adobe Premiere, and Aftter Effects, but don't know much else. Find some software you like and look for tutorials for that software. MS Movie Maker, and Avid DV are Free software. The rest cost a some mad loot! Hope this helps

Oh yeah, and a WHOLE LOT OF RAM, having a good processor would help a lot too.