The camera was a Canon HF100, everything set to auto, recording on the lowest quality setting (low on space on the SDHC card).
Audio was supplied from a Sansa Clip MP3 player w/FM tuner, tuned to the FM channel for the light show, fed through the line input on the camera.
No edits, this was done in one shot, then run through iMovie to do an export to .m4v file.
Last year this setup did not work very well, due to not enough white light. This year, a second tree in the house with white lights allowed the camera to stay focused throughout the recording event.
The lights on the "Mega Tree" and house are LED, the rest of the lights were standard minis (this year)