Biggest thing I see is your backswing goes back too early and comes forward way too early. Keep your disc on the outside of your off foot's toes. Your maximum reach backwards should 1) be momentary/split second and 2) happen simultaneous with the lead toe touching the ground.
A side view would be helpful. Can't tell the disc position or if you're tipping over the lead foot.
Footwork looks OK except for that odd sidestep there at the beginning, but that might be due to the pad.
What helped my nose-up problem was... ok, imagine there is a line poking straight out of your sternum. At no point in your swing should the disc be behind that imaginary line. AND don't add any power with your arms (pulling is bad), until your sternum goes past 90 degrees toward target. This forces your elbow out front, and makes strong arming difficult. Hips do the work until sternum gets past 90.