Wow, dude can play. Shame they couldn't get the actual audio though.

So glad it wasn't a commercial either

Yeah... dunno if you were just subtly pointing out the obvious @ChaosEngine, but noticed that too. "Impromptu" just in time to set up the mic!

well according to youtube, that is Herbert playing, but the audio from the train station was so awful, they overdubbed it in the studio.

Ultimately I don't doubt it. Skilled player; beautiful music. It completely ruins the idea though.

*livemusic

Adding video to channels (Livemusic) - requested by ant.

Note: in order to clear up some confusion expressed in the comments with regard to the sound on this clip, the stereo audio recording was made independently of the camera (which has poor sound) and later synched in post production. The 'percussion' sound that can be heard is not a hi-hat or a snare drum, it is possibly audio peaking, (unlikely), or something resonating inside the piano - most likely a broken string. The recorder was placed very close to the back of the instrument near the floor, and was therefore closer to the noise made by loose stuff rattling around inside. I only heard this on playback when I got home - didn't appear on the camera soundtrack.

Yeah... I would have missed my flight.

I believe you guys are misinterpreting what the YouTube poster is saying.
The audio was recorded "independently" as far as the device, not the occassion.
You're hearing the actual audio of the recorded event.
He just had to sync the audio that was captured from a device such as this:
http://www.amazon.com/Zoom-H2-Portable-Stereo-Recorder/dp/B000VBH2IG
to the footage from his camera.

Then I'm probably not misunderstanding it. Showing up with a mobile recording studio is in no way "impromptu", and that's basically what kills the novelty of it for me.
Sounds like a great player, and it's enjoyable music, but the era of "reality" TV has ruined me for things in like. Skepticism, et al.

A second mic is a mobile recording studio? Hardly.