The horse looked fine, and the driver wasn't being reckless.
I fail to see a problem, even though the author of the YouBoob video was blabbing about HOW TERRIFIED the horse was, ZOMG! Um, no, he/she wasn't.
I remember those racks from back in the day. Are they the absolute best
way to haul horses? No, but they're hardly the death traps some people seem to think who have never known anything except enclosed trailers.