I regularly, many years ago, reversed a car with a trailer. And I had visibility out of the rear window. I've also reversed light vans where there are only mirrors.
I can only imagine how careful one has to be to reverse one of those things without jack-knifing. Around a bend and on an incline, too.
Looks like xe mounted the verge a bit, from that soil trail, and then took the outside of the bend for best visibility.
10 minutes seems about right. (-:
