Chef Todd Mohr
I mentioned Chef Todd in a comment earlier and thought I'd give him another look-see. He runs a website called Webcookingclasses.com but nevertheless has given away cooking instruction on YouTube for five years now. And it's not bad stuff.
His approach is to ignore recipes and teach cooking techniques, which has long been my philosophy as well. Here's one video where he compares how different vegetables fare when cooked in acidic and alkaline solutions:
It seems simple and yet it's something I've never seen addressed so directly in any other cooking show.
It's really a shame that his videos have relatively few views, because overall they contain pretty good information.