How on earth did he get into that  I know only to well how easy it is to get into trouble with one of those machines, they are so heavy that to close to an edge and in you go, but these machines can almost get themselves out of all sorts of trouble, but it the engine quits you are in big trouble!

I am surprised the engine started and no water got into the cylinders and turned to steam when it started.  Can cause a lot of damage to the engine.
Once the engine started he could almost got himself out, I say almost.
Nice recovery and well filmed.
I have driven one of those, but not for long.
I was once buried inside a Caterpillar, I was still at school and I was driving a Cat where they were building a bridge (well, it was to replace a bridge with an earth road, two huge pipes and loads of sand to build it up to road level) and I was asked by the operator if I wanted a go at driving it.  I had been watching them for days.  I had spoken to him before and said "I bet I could drive one of those" so he asked if I wanted a go.
Daft thing to ask a school boy, so next thing I was inside driving it.  An hour later and I was told the operator could have a nap!
He had no longer said "You would think you had been driving one all your life from the start" when there was a "woosh" sound then one almighty "Bang" and then it all went black.
The operator panicked a bit, then calmed down.  He sat looking at the glass, only the side that was hot directly had broken and a bit had fallen out and had went right down past us onto the floor without hitting either of us!
He was a bit worried about the air lasting or we were dug out.
It was very quiet, except for the creaking of the cab from the weight of the sand.
The Bulldozer engine had quit when the sand hit us, never quite understood why, exhaust full of sand and air intake blocked, but I remember it quit instantly.
The operator was very concerned the glass would break and the sand would pour in, so we went to the other side of the cab, as if it would make any difference to the sand filling the cab anyway.  We had no idea how much sand was on top of us, could have been a few feet of 30 feet.  I reckoned it couldn't have been that deep, if it had been it would have smashed the windows and came in.  He was not so sure, he reckoned we were lucky there was no big stones came down.  Then I pointed out the big one on the windscreen.  i shouldn't have, it just made him even more uneasy.
However, half an hour passed and we felt the ground shake a bit, we thought it was one of the lorries back to dump sand, then there was silence.
I sounded the horn, I knew it worked as he sounded it to tell the lorry drivers where to stop and tip the load of sand they had.
We heard a very faint sound like a horn, so we replied, then it sounded again.  Then we heard, or rather felt another lorry come in, there was silence.  Then what appeared to be a few blasts on a horn, air horns.  I knew what lorry it was, the big tipper.
We felt a lorry leave, at least we thought it left.
Some time passed, then we felt a lot of vibration, almost bouncing and sand started to move and pour in through the broken part of the window.  This was not very comforting, especially as the air was getting a bit stale.
We heard some strange scrapping noises and sand was shifting and moving around.
Next thing a bucket hit the side of the cab, but quite gently, sand ran down to fill the space where the sand had been removed when the huge bucket moved away.
A few more scoops and we saw some light and a face appeared, it was one of the lorry drivers standing in the bucket of a huge loader that was loading the lories at the other end.  He must have come down the road at one hell of a speed as he had a long way to come!
Anyway, within half an hour of that we were free, we very carefully got out the side where the sand had been removed and looked back.  Wow, sand was piled up on top, the whole bank had given in, sand, earth, rocks and a bit of the road.  They had to put traffic lights there as the road was so narrow.  The road went round in a horse shoe shape and across the old bridge, so the road was on each side of the road works where the bridge was being built.
The earth was piled up at least 25 to 50 feet above us.
They reckon it could have collapsed at any time and was lucky it didn't when school buses passed or heavy lorries.
The cab did its job, protected us, but I was not allowed to drive it again, just in case something happened.
They blamed the Bulldozer operator for it, but he hadn't touched the bank yet, so they had to admit it was a disaster waiting to happen.
I had to content myself to run in the lorries after that collecting sand, but after a while we had to stop.
There were to many white hats appearing on site, it was just in case they said anything.
These days we would not be allowed to go in the lorries, let alone drive a Bulldozer.
Those were the days!  It is how we learned things back then.  None of this wrapped in c