Vierne "Hymne au soleil"

Hi,
my new video:
http://www.youtube.com/watch?v=wrxp1Cxi4-s

with the great sample "Notre-Dame de Metz"!

Great, fantastic.

I like the very quick piston usage at around 1:22, I almost missed seeing it.

Hi,
my new video:
http://www.youtube.com/watch?v=wrxp1Cxi4-s

with the great sample "Notre-Dame de Metz"!

What are the "how-to" basics of creating a video like this? How do you synch the Hauptwerk audio recording with the video? Or do you just use the Video recorder alone and capture the audio as it sounds from your external speakers?

Thanks

P.S. Dynamite performance!