It looks like your legs are a bit weak. During the sitting trot and the canter, I noticed your legs swinging a bit. Not too much; it's not a big problem now, but it is still crucial to have a strong leg. It's especially nessesary to have a strong leg while jumping, so as you approach a jump, squeeze with your legs.
Other than that, though, you're a really good rider. :)
:) Live your dreams ~ Only you can choose your future :)
XD Laugh at your mistakes ~ You learn from them XD
<3 Love with all your heart ~ Chances are meant to be taken <3