I'd like to point out something that was done wrong after the wreck (probably). They should NOT have gotten them out of the jeep and walked them down the hill.
In a rollover like that, back and neck injuries are very common. I'm assuming since there was a chopper there, they called it in, unless there was a chance of fire or worse injury, they should have been left in the vehicle with their bodies and necks supported, a good way to do that is to shove clothing and bags into the voids beneath them.
I STRONGLY suggest people get wfr training, it's not expensive and very valuable. If they had the training, in the event that there was a threat of fire, they could have supported the back and necks of the patients and extracted them safely to wait for the chopper.
People are willing to put thousands of dollars and hours into their jeep, they should put a few hundred dollars and 80 hours toward training...