So, I know this is cheapskate-ish, but hey, tons of people offer it.

I don’t need step-by-step crap, I’ve been playing violin for years and have taken music theory. I need technical instruction on how to play the guitar.

So, does anyone know of YouTube channels that teach mostly technical aspects of guitar and/or bass guitar?

It could also be from some other video site, but the idea is that it’s free.
Thanks. 🙂
@dude: I don’t want somebody who spends most of the videos saying “This is called G clef, this is middle C on this line on the staff.”
I want “this is how to hold the guitar, make sure your hand is….”
Oh yeah, just general technical stuff, no particular genre.