Ok...yeah looking at your vid, your reach back is way off axis and your run-up is for annie creating more off axis torque. Try x-stepping(not running) left to right of the tee pad and keep your reach back loose and low. Don't really focus on the reach back, it happens naturally from the x-step, just keep the disc on the right plane. Also you are pulling early and not leading with the elbow(I think hard to see from that angle), try getting your shoulders more forward(weight forward) before pulling. Looks like you threw nose up in the vid, getting your weight more forward will fix that.