Artist Molly Crabapple has illustrated excerpts from one of Susan Cain's talks (to the Royal Society for the encouragement of Arts, Manufacturers and Commerce), and this is that video. :) It is short and sweet and I enjoyed it.
If you are not familiar with Susan Cain, she wrote a book called Quiet: The Power of Introverts in a World That Can't Stop Talking. In Quiet, she explains and then questions America's "Extrovert Ideal" and our cultural bias against introverts, and really knocks over the stereotype of "introvert as unfortunate". It was an encouraging and interesting read, and I took much away from it.
She is also known for the excellent TED talk she gave, which I also thoroughly enjoyed.