Hi!
The most important thing is not to use standard camera sound.
I have posted a number of videos on YouTube, many of which have been well received and which I hope give pleasure, but FULL organ, compressed by automatic volume control and distortion gives quite the wrong impression and
http://www.youtube.com/watch?v=tPwfJOyo5Eg has had the vilest comments (probably from the vilest people) as a result.
In that video, on the left, I can see the stop lights are lit for the extraordinary French Trumpets which sound through Altec theatre horns - and are very effective in real life but colour the sound of full organ, together with the 128ft stop modulating the automatic volume control at 4Hz
One simply has to use a sound recorder and add the WAV file to the video seperately.
Best wishes
David P