Actually, I think she has a nice release. To me, it looks like she has a light contact while still giving her horse her head. I'm not the best judge, though, so other people correct me if I'm wrong! But, to me, it seems like she has soft, forgiving hands. I agree with what other people have said: work on sinking your weight into your heels- two-point on the flat would probably help with this, if it's done correctly. Your weight, in the two-point, should sink your heels down. Also, work on keeping the stirrups on the balls of your feet.
Another thing is that it looks like you may be gripping with your knees as you jump. Again, two point on the flat will probably help.
Another thing that no one has said, is that you look like you need to lift up through your chest. You're kind of collapsing through your chest, so shoulders back and chest up! And one last thing- look up :).
I think that if you fixed your heels, your whole position would change for the better. You look like you have a good position, and if you fixed a couple things, it would be great!