Your seating position is completely wrong, that seat would offer decent lumbar support and you don't use it at all. Imagine a 4 or 6 point harness, you'd be bolted to that seat like you should be. What's more you're restricting your own movement by sitting too close to the wheel, but that would probably be sorted just by sitting
in the seat and not just
on it like you do in the video.
When shifting, grab the knob, don't throw the stick vaguely into the right direction. The G25 shifter may be delicate, but it can take proper shifting just fine. You're not doing yourself a favor handling it differently than a real car just because it's so light and a short throw.
As for the drifting; Considering the steering lock mod was used, it was rather poor. The angles you pulled can be achieved with 36° just as well.
It's nice allowing people to see your actual driving, but when you prefix it with "How Live for Speed should be played", you better make it a bloody awesome performance. This didn't qualify in my opinion.
I'm not trying to provoke an argument, I'm just voicing my honest opinion