late tot he party here, but back to the videos.  I lived at a hotel on Sloane St in London (where both of these videos were shot) for 6 months while trying to close a deal on the first company i started.  It just happened that I was there during August, when most of the money from the Arabic peninsula migrates to London to escape their heat (along with their cars).  

It is seriously one of the most outrageous parade of cars you can imagine (in a good way).  not only is every exotic rolling down Sloane St for month, most of the exotics are the limited edition, etc. 

Personally as a car nut, I don't mind the revving.  I remember looking out the window during one long legal call and watching about 20 million pounds of cars drive by during the hour.  I can see the immaturity of the people in these videos and I think it may be more common than not, but I am still a fan of watching these cars drive by.