This is very cool.
My only concern is that audio in this video has perfect stereo separation. It is virtually impossible to achieve this w/o recording each instrument separately and then mixing it later. That makes me suspect that what we hear is not what we see.

[author flagged as a spammer - redacted]

Since the camera moves, but the sound doesn't change to represent that, I would say you're at least right that what we see isn't what we hear. That said, I would guess he just recorded the audio separately with a decent set of stereo microphones properly placed for best sound recording.

There is some noise in the YT as to whether it's a MIDI being played or not.. But it sounds like a fairground organ, and the punchcard tracks being fed into it as well as the organ action matches the song being played so... They have an uphill climb to convince me they did anything other than properly record the audio instead of using the microphone on the camera.

Simply delightful ... *quality

Boosting this quality contribution up in the Hot Listing - declared quality by PlayhousePals.

I would have used post production to make the figurines bang their heads...

This one however is certainly genuine https://www.youtube.com/watch?v=ouxbu-bfbVY

Hah! Sift it!

The audio is just good mixing. He probably used a half moon array of 4 mics and spread out the sound stage. The room looks like it has no acoustics in itself. After the audio is done they just played the performance a couple times getting many different angles, and then synched it with the main audio track.

Music video making 101.