I haven't seen any othe videos of you doing dressage shows, so can't make any comparison. Overall, I think you ride very well.. Your have a very upright position that is consistently so, no matter the gait. The down transitions were quite good and the horse had a good bend except for a few sspots where he fell out of the corner through his shoulder, but that had a lot to do with him worrying about the judges booth behind him.
The only thing I could think of to comment on was that your seem upright and a bit stiff, to the extreme. When you are posting, it seems a bit like you are really tight and not coming up as far as might help your horse feel more encouraged to move forward. There's a feeling of you being really stiff in the pelvis, and I wonder if this isn't ever so slightly holding the horse back and encourages smaller steps with less "loft". I noticed that with that stiffness your elbow didn't flex as much as would best allow the hand to be softly following in one place, relative to the horse.
You asked us to be harsh, and that was about the only thing I could see. And it's not much. I thought you did well and will assume that you got a good score.