I'm probably the last guy on earth to discover this site, but if not, this may be of some use to you. It's called YouTube and it has me addicted. You've got a smorgasboard of "funny" stuff on the site you can watch, the kind of attachments dorky workmates are probably forever sending your way (some of which are actually really funny, like this one), but amongst it all you'll find your insatiable hunger for geekoid music-related clips deeply satisfied.
For instance, you'll find such gems from the mighty Black Flag like...
Chuck Dukowski being interviewed on LA TV at the height of 'Flag's gig bust-ups c/o the LAPD (mohawk period!)
The clip for "TV Party"
Black Flag playing in Mike Muir's(!!) garage in '83
The clip for "Slip It In"
Black Flag's Target video
Bad Brains playing CBGBs in 1979
Bad Brains in 2006 w/ the Cro-Mags' John Joseph on vocals (please note: this is not a good thing at all. In fact, it is so bad I recommend you watch it)
Sun Ra losing his shit on the keyboard
The Germs live at the Whiskey or perhaps the Target video
A funktastic Parliament video
A bucketload of Minutemen clips
Amon Duul II on TV in 1970
AND... you get the idea. This one? I laughed.