The first clip I'd like to share with you is of Barney Saltzberg, creator of the fabulous book Beautiful Oops! Though aimed at a younger audience, Barney's message of using mistakes as a springboard for creativity is a great message for anyone of any age.
Another artist-turned-educator that I find really inspiring is Lynda Barry, who teaches at the Wisconsin Institute of Discovery. I highly recommend her books Syllabus and What It Is, both of which share her insights into the creative process. Here's a video of Barry at work in Wisconsin.
These are videos I've turned to time and again when in need of inspiration. I think they both share a powerful and transformative message about the real value of creative education.