I think that he made a mistake when he started the trip. Hi was driving a Jeep. Ha Ha Ha. OK. Over the years I have seen a few vehicle fires in the bush. Some have been caused by either driving or parking over long dry grass. This man was driving a track with long grass in the middle. Although difficult he should have driven with his exhaust as much as possible over the low section of track. He recognised that he had a fire but instead of grabbing the extinguisher first, he opened the bonnet allowing more air to the fire, which wasted valuable seconds. Other mistakes such as driving alone etc. could be excused as he was driving a relatively safe track and not rock hopping or swamp bashing.
I only watcched up until the fire so do not know how he got out from where he was.