У вашего броузера проблема в совместимости с HTML5
The Traxxas Summits in the video can be bought here-
http://www.amazon.com/gp/product/B0039208Q2/ref=as_li_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=B0039208Q2&linkCode=as2&tag=fordt-20&linkId=F7VT7MTG4DWFWZSJ
Here it is two identical Summits, one with a stock Motor stock 14t pinion and one with a Dewalt 820 motor 19t pinion. While yes the pinions are different, that will only affect the top end and should actually hurt the dewalt on the low end. Even if you think the launch times aren't perfect, check out the rear end squat, that tells all.
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