I just took my Jeep to the a shop and had the brakes inspected. The front brakes are in great condition but the back two according to the technician need to be replaced (pads and rotors). But he said the noise don't seem to be from the brakes.
From his notes " rear pads and rotors, pads 1-3mm " He told me that the back rotors and pads need to be changed and quoted me $600 CAD to change the rotor and pads.
But he wasn't able to hear the replicate the noise on the video and does not know what might be causing it. I have noticed it happens when I have been driving for a while. I have seen a lot of videos on youtube of people having the same issue and no one seems to know what might be causing it. For example the video below is very similar to the sound I hear.
I have attached some pictures of my back brakes. He also mentioned my shocks seem to be leaking and quoted me $1100 CAD. My jeep is only 3.5 years old and I just can't understand why the shocks would give up so soon.