Nice Vid. In a controlled environment, and in an appropriate time and place - I think is great fun to play about. I'm no driving god, but as a result of playing about in car parks or dead back roads, Its giving me the confidence and ability to be able to throw my car around, 4wheel drift, and keep control of the car. Which has subsequently helped me out of trouble once before and may well help again sometime in my life.
Appreciate its not quite the same, but its a bit cheaper than taking an advanced driving course.
Usual disclaimer - I accept no responsibility if you put you car into a tree or wall as a result of playing