Count your strides in between fences. The first two fences should have had either five long strides or six high tempo short strides - you appeared to take 5 1/2 strides and jumped the second jump a little unbalanced.
Make sure you have a strong core and watch that your head doesn't bounce around too much in between jumps. Shoulders back a bit.
That's all I have as I could only get the vidoe to load the first half. Keep up the good work though!
All horses deserve, at least once in their lives, to be loved by a little girl.