Good video. They sounded like Australians. Americans make a big deal about dirt roads with a few washboard ruts in them. That truck would have benefitted from a snorkel exhaust. We can guess it was a diesel otherwise it would have lost the electrical system and spark.
Dingo, You mates Down Under have a certain wild character that Americans love. I would have called those rivers impassable, but that is a result of living in dry country. I used to pound the bush for a living and never got anyone hurt or had to walk out, or never needed a tow truck. But that doesn't mean I haven't been stuck for 12 hours with chains on all 4 wheels. Please show us some more video so we can learn something.