I'm sorry, but that [gait] just looks like there is something seriously wrong with them. Not to knock the breed or the showing of them, but that particular gait is..... "******ed" is the only word I can think of. It looks like they have to go pee, or they have ants in the pants, or someone stuck a stick up their rear,.. or something.
I'm sure their normal gaits are prettier. =)
On the other hand.. it must be nice to have a smooth horse! - My horse is like riding a pogo stick on a gravel hill. =P