So... who's the Ducati with Red and White leathers at the very beginning?
Come on... fess up.
Nothing rule breaking, but your body movements are too late and too abrupt.
Going into 3, you noticeably hop off the seat at or almost after the turn in point. Your butt cheek should have been in place long before then... so that all you would have had to do is lean your upper body.
The turn in point is when you are making a firm steering input... you don't want to also be doing a huge body movement.
Coming out of the corner, as you go up the hill, you once again "hop" back into the seat. Once again, this is a time when you should be dialing in maximum throttle and paying close attention to what the rear wheel is doing... definitely not the time to be hopping around.
Try to set up earlier going into the corners... and use your leg muscles and core muscles to slowly ease your way back to the middle of the seat.