Here's a few links to interesting fractal videos. To me, they all seem to share a similar, glitchy, abrasive aesthetic - though as far as I know they have nothing technically in common.
'Gestalt', by Thorsten Fleisch
It's an 80MB download, but it's really quite stunning.
'Gantz Graf', music by Autechre, video by Alexander Rutterford. OK, so it's not exactly a fractal. So sue me ;-)
CLUT, by Joe Gilmore and Paul Emery:
Don't know how this is done. It looks at least partly procedural so I guess it's not totally off-topic.
I'd be interested in any other nifty videos anyone would like to post...