Maybe, but maybe the camera on the left is causing a large yawing to the left. This is then countered in level flight with lots of right-trim on the rudder and ailerons, maybe mostly in the rudder, so it can fly a straight line at all.

Then, when the plane is rolled left, the plane still has a lot of right rudder in, which results in a hard slipping turn, espeically if no rudder is used to coordinate the turn. This will look like the nose pitching "up", when it's really more a yaw to the right combined with a slight pitch up. Basically adverse yaw on steriods.

I'm guessing though.