I would try to keep your arms rotating on a level plane around your body. They are whipping over your head kinda corking, this may be because you are also heavy in the back seat when you leave the lip of the jump.
Like Argo said try to pop off the jump with even pressure on both feet.
Looks like you had a good set up carve
Keep at it "first is the worst" right, you'll get it cleaner with time