It looks to me that PF, having pitched up at rotation, released the side-stick to neutral before Normal Law had blended in. So the aircraft started returning to level pitch, but then PF realised and re-applied pitch up.
There are about three or four points during the take-off and initial climb where the pitch goes up then down again. Aircraft seems to be very heavy. Possibly an F/O new to large very heavy Airbus' and not used to the slow rotation and unstick. Or a side-stick problem, stuck in Direct Law, or CG badly wrong ?