I hope you asked him after the first throw to not land on you again, that looked painful! I really liked how you switched to the back grip in the first two. I am going to play with that tomorrow and see how that flows.
Not to over simplify harai goshi but the major differences I saw were that he slid all the way across your body really pushed his hips into you and reaped the opposite leg. I am definitely more comfortable as of now with uchi mata as I don't worry that I have as much to lose if I miss it.
I really need to work on the non power hand grip as well based on what I just saw.
What we think, or what we know, or what we believe, is in the end, of little consequence. The only thing of consequence is what we do. -John Ruskin