Hows my jumping postition?

Don't jump in a western saddle. You can't two-point properly because of the different saddle conformation and the horn. You position looks okay, though I would try to stretch up a little taller with your upper body, while keeping your hip angle. Also open up your shoulders a little. I noticed that your reins were extremely slack.. you want to give release over the fence, but you should still feel a light contact on the horses' mouth.