Darn, YouTube reduced the sound quality from 256kbps to 128kbps. It might turn up though. In the meantime the original video can be downloaded at http://www.sendspace.com/file/6w865f

I mixed together the best video of this performance (from jwipe) with another audio (from brett337).

This audio has its ups and downs - it is higher fidelity and you can hear David's nuances better and it sounds "closer" and more "immediate" - Also, the talking is much less noticeable. :)

BUT it also doesn't handle the loud parts as well. There's some distortion in a few places.

Thanks to both jwipe and brett337 for their amazing videos! Here are the original videos:
jwipe (source of video): http://www.youtube.com/watch?v=2d6hHb8-cA0
brett337 (source of audio): http://www.youtube.com/watch?v=MyMxTzt9HCU

P.S. For more videos of David, subscribe to my page. Thanks! (less info)