Check one thing for me will you?
Next to the fuse box is the relays for everything. If the clicking in your last video is still present the relay that is making the noise should be apparent. If it is, swap it out for the headlight relay. The headlight relay will have 2 brown, 1 green and a black/white wire going to it. See if that fixes your problem.
I had a problem with a "14 model that wouldn't allow you to turn power off to the entire unit, even with the key removed from the ignition the dash would stay completely lit up.