The main thing I noticed is that you seem to be holding her back, like you need moer release. She looks like she is pulling on the bit, which im assuming is why she is so tight and tense.
I love your eq. overall. The only things I noticed is that you need more of a release and your leg slid, just a tad bit, causing you to over jump a little. Do you have no stirrups? It sure looks like it!
I really like that you are looking up and ahead and that your heels are down. Those are the two things people always forget. So kudos to you!
Please correct me if im wrong about anything. :]