“The Reason Behind” is a nearly three-and-a-half minute montage that shows how Porsche uses racing as a development tool for the vehicles it sells today. A Sedan hints at another model in its compact-car range. The concept also previews a new styling direction for the brand with fewer lines and more rounded surfaces. In between clips of racing footage, a boy is shown walking through a garage filled with Porsche vehicles from the past and present. according to the rankings compiled by Visible Measures. Several automakers had new videos this week, including Hyundai, Jaguar, Maserati, Mercedes Benz and Suzuki.