I only watched a little of the video, up to 1:21, and I never saw anything from before this so I have nothing to base my observation on other then this video and the little bit that I watched.
Maybe it is just me but you looked a little all over the place, a little out of control. I do not know how long you have been riding so it is hard for me to give you a real critic. I can say though that I can tell that you are trying and that is seems like you have yet to really figure this horse out yet. Do not let my comment cut you down though, I do not want to do that. I only want to give you my honest critique. Good luck and continue to work hard. You are such a tiny girl (not a negative) on such a big powerful looking horse so I think that might have something to do with why it appears like it does to me.
I also want to say your already cool in my book cause your riding a mare named Penny. I also ride a mare named Penney, its spelling is just different :)