Reading your original post, you said you were 'exccited'. To me, that might not mean a forever horse, but one or a breed you might have been wanting. Then, regarding his possibility of being kept whole, it looks to the reader, as though you might be planning on breeding. Again, to me anyway, it means you might be keeping him.
You also mentioned that you had put a down payment on him. That didn't look to me as though he was being taken out of a less than stellar environment.
The video in the overgrown roundpen, was not good enough to really see how he moves. I do think he possibly has a nice long stride but not much action in the front. Quality Saddlebred babies are born with incredibly high action when trotting.