I have a question about gimbal: What make my camera tilt sideways? I was flying at a normal speed and suddenly my camera tilted sideways, meaning right and then left.
The title of the thread says "is my gimbal out of balance?"
Based on a quick look at your videos it seems fine, although there was an odd jiggle between 11 and 13 seconds in the last video you posted (the color corrected one).
The best way to determine if your gimbal is out of balance is when the Solo is off. Search these forums for "gimbal balance" or something like that. A balanced gimbal helps reduce vibrations.