It goes with the music, you have a sensitivity Knob, so you get to mess around with it to your liking. I have the device hidden in my glove box, its wired into my remote start/ ignition, comes on with the key, and off with the key. You can have them either On, Music (different sensitivity) or Off. The device comes with couple of extensions, you can hook up to 8 different strips to it, maybe even more, my next plan is to put them under driver, and passenger seat so they can light up the rear foot wells, i'll mount them on the metal bracket of the actual seat, that way they don't move when you slide them.
If you skip over to 0:38, you see the device, then i have them on ON, after that for the last 2 seconds.
and thanks Fas93, i am good now, i am guessing it was that 24hr cold thats been going around.