Just a footnote to this one.
I
made my wife watch those vids and explained what the drivers were doing wrong and what they should have done. I got the usual 'cars, boring crashes yawn, I've been driving for 15 years etc etc, on that bluddy frontera website again are you , blah blah.'
Got a text from her this morning saying that as she approached a large roundabout on the way to work she hit black ice and was skidding out of control into the back of the car stopped at the roundabout (2 of my daughters were in the car with her

) just before she was about to hit she remembered what she had been told and took her feet off all the pedals and just managed to steer around the car and came to a graceful rest up a low verge. No damage, no one died. Result!
So regardless of what others have said , I am grateful that these vids were posted and should be mandatory viewing for all drivers!