Conformation pics, I don't see any huge glaring problems (although they aren't the best confo pictures). I'd like to see his hocks a little bit lower to the ground. In the last picture, his hooves look way long. Teensy bit long in the back, and his throatlatch looks skinny? (maybe the best way to describe it) Head is a typical "horse" head and nothing super pretty.
But all in all, not a bad looking horse.
Can you post a picture of the bit you use on him? Not saying you are, but some people are confused on what the word "snaffle" means. It looks like you are using a shanked bit on him in the video, but it is hard to tell.
And I don't see why your excuse is valid for the stirrups being too short because it wasn't your saddle. If you can take the time to adjust the cinch and saddle to your horse, then you can surely take an additional 10 seconds to properly adjust the stirrup length. Not an excuse. If you want to do a good job on the poles with him then you need to set yourself up for success.
∞•*˚ Βгįťţαňγ ˚*•∞
It is not enough to know how to ride; one must know how to fall.