I actually noticed the same thing in the video. The Ridgeline driver was "jerky". He didn't keep a steady pedal or maintainin a steady speed and momentum. Let's face it, they weren't rock climbing. It was a steady incline on slightly more than a gravel road.
The Ridgeline driver stopped every time he came to a tiny pebble and felt a little resistance. Then he'd give it some gas, lurch over the pebble, and stop again. Then repeat. Slow and steady would have kept him moving and might have kept the transmission happy.
Yup. Every time he does that, the system has to recalculate and engage all over again; brakes, transmission, clutches... The works.
It's a sure-fire way to heat up a clutch mounted in a transmission. You have to get these things going and then just let them work. Rubbish for rock-crawling, but perfectly fine for what he was trying to do, as well as on sand, mud, snow, and ice.
Cheers,
Kennith