Thanks for the credit, Vain!
Though I only had patience to watch the first two minutes. Would have been better if you had shown only your defending on the last laps - 12 minutes of video-game (sry scavier, just wanna sound more dramatic) onboard video is too much for anybody..
Of course drifting is faster if you haven't got enough lateral grip (obviously drift setups are made to reduce grip) and have to compensate it with longitudal traction to get around corners. That's exactly why pre-war GP cars and today's rally cars drift.