Here is an amazing video in which Hayek is interviewed about his knowledge of Keynes. He makes very strong claims that Keynes was blissfully ignorant of economic theory, monetary theory, economic history, and the history of economic thought. Unlike some other interviews of Hayek, the audio is clear and this clip is only 5 minutes long.
Mark Thornton is a Senior Fellow at the Mises Institute and the book review editor of the Quarterly Journal of Austrian Economics. He has authored seven books and is a frequent guest on national radio shows.