[Thanks to Blogenfreude for the heads-up.]
UPDATE: Wow, he's a great extemporaneous speaker. He's also talking about this issue in a way that would make it easily understandable even for someone who was just tuning in for the first time.
UPDATE 2: It's over now, but the video should be available shortly, and I'll either post it (if possible) or direct you to it when it's available.
UPDATE 3: Here it is, and I'll post a transcript if/when I can find one:
UPDATE 4: The transcript is here.