Option videos are a joke, the car being "showcased" always wins, they should call it Option rice videos. I have seen videos with Supras showcased that won, and the Japanese Supras have less power than the US Supras.
The Supra may not handle as good as the Viper (few cars do) but when Car and Driver did their "Best Handling car over $30K" test the Supra came in 4th in the roadcourse. Viper was 1st, Ferrari 355 2nd, C5 3rd (.2 seconds ahead of the Supra), Supra 4th, Porsche 911 Carrera 4 5th, M3 6th, NSX 7th and the Porsche Boxster was 8th. Considering the fact that many of he slower cars (and all 3 of the faster ones) had significantly better power to weight ratio than the Supra that's not too bad, not to mention dealing with turbo lag.
This video was clearly a "drifting" video, fun looking to boot.