Uh, I believe the Viper won that race. At 0.47 in the video there is at least one frame in which the Viper is showing a final time but the M5 is not yet showing a time. I did a screen grab (with no Photoshop funny business!). The camera is positioned so that it is impossible to see the final times for the cars, so there's no other way to know who won the race.