For your age and size you show a tremendous amount of potential. Your stride could be a little longer, along with a delay of your planting your stride foot - HOWEVER, it's only because of your age and muscular development, that's still in the growing phase of your life. Give it all time and a lot of patience.
You're worth bringing along, slow and easy. your upper body shows a good amount of balance and perspective along with timing your shoulder exchange and your glove arm discipline. Again, you're still in the growing stages of your life - so don't rush things by trying to howitzer the ball with all your might for the sake of velocity.
You impress me as a pitcher with detail and precision. A pitcher that could, with just a little bit of discipline and coaching, could spot the ball just about anywhere he wanted to.
Your next step should be to find a mentor, a pitching coach that understands your age group, your physical develop stage(s) now and in the next two years. He/she should map out a diet and nutrition plan with a balance of carbs/proteins/ hydration and sleep management. He/she should also condition your coaching for the off-season/preseason/prime season/post season.
Soon or later someone is going to tell you much of what I just mentioned, only because you're the genuine article. You're very well balanced and worth bringing along.
However, think this training stuff through carefully. It's a gift to have the natural talent that you have, a real gift. On the other hand, it can be a very heavy weight. Coaching talent like you have - in the rough, can be a long, drawn out process. Many youngsters with talent like yours fail after only five or six months of coaching, only because it's so demanding and time consuming. On the other hand, if you ever had the intention of pitching in the professional business - you have the foundation, "as is".
I know talent when I see it. I see it in your short video.