This is arrant nonsense. I have also lived and worked in China for many years and my wife is (mainland) Chinese. I utterly refute everything you say here except one thing. A lot of Chinese people do rate money higher than anything, I agree with that - but do not tar every Chinese person with the same brush. I can tell you that from my own experience there are many mainland Chinese with much higher morals, integrity and decency than your average westerner. I am sorry for you that you learned so little and met so few educated Chinese during your "many years" living there.
The problem that is highlighted in this video is the fear of becoming personally liable by helping someone in trouble. That liability is utterly daft. If it changed there would be some improvement, which would take time, but there is a prevailing mentality among Chinese that you help family and friends, not strangers. That has undoubtedly worsened in the last 30 years.
If it's fear of liability, why don't they stop, call emergency services and keep the area safe until help arrives?
Not moving her probably isn't a bad thing, as she may have spinal fractures.
..as I said, it wouldn't occur to them, why should it?
This video is about a basic lack of morals more than anything else.