ahh ok he does like under his wing tickled but my hand doesn't bend back that far to do it lol and he only does it when in cage not when hes out XD
beak clicking does it all the time
There are three kinds of "clicking" type noises that I know about.
1)Tongue Clicking: Is a rapid clicking of the tongue against the beak, which is usually a way of saying "hey, I'm not in a bad mood, I won't hurt you, I want to be friends" I know this is most often seen in cockatoo's and cockatiels, but it isn't unheard of in other parrots.
2)Beak Clicking: This is normally a very sharp, consistent clicking. Often accompanied by neck stretching, this is a signal that the bird is feeling threatened by something, or is "protecting" something they find particularly important. generally speaking though, putting your hand up to a bird doing that is going to result in an unfriendly bite, so we can probably rule this one out.
3) Beak Grinding: While not exactly "clicking" I think the sound is close enough to count it in as well, sounds very similar to kids grinding their teeth. This happens when a bird scrapes their upper and lower mandible together, and is usually an indication that the bird is feeling very secure and content.
I wasn't able to watch the videos to get a better idea for exactly what your little one is doing, but hopefully that gives you enough info to figure it out
