I find it funny that he complains about the seatbelt, it's the same simple tilt mechanism everyone uses to lock up the seatbelt in an assumed hard deceleration and/or rollover situation (it's basically just a ball or weight that moves and engages the locking pawl on the belt reel when it's not at true vertical). I would imagine anyone who has offroaded a vehicle made in the last half century who has had to unbuckle/rebuckle on the trail has dealt with that.
But yeah, it doesn't seem like he had the electronic aids engaged; you should have heard more aggressive clicking/solenoid noise from the braking system as it engages the ATRAC for the wheels like you do when he had DAC engaged at the end (on a side note, I don't think I've ever tried to see if my DAC works in reverse... I may have to try that next time for shits and giggles).
Post Note-
Also I know that those are P-Rated tires, but is it just me or does it look like he's running street pressure on those loose rocks on both vehicles?