The video does not offer an unequivocal statement of what the roundel represents, but it rather goes through history of BMW all the way to the Rapp Motorenwerke origin. The video says that the roundel color scheme is the same as that of the Bavarian coat of arms, but it does not say clearly that the Bavarian colors in the roundel are used to represent a spinning propeller. The BMW entry in Wiki (http://www.bmwdrives.com/bmw-history.php
) is not so shy - it clearly refers to the aircraft origin of the badge, showing the same 1920 black-and-white image of an aircraft in flight as that in the video. It is possible that the company might now try to soften references to its aircraft engine origin, lest the roundel-carrying car owners who are in the fear of flying be concerned that their ultimate driving machine might take off and perform Immelmanns.