Thank you all.
Yes, I am driving in pedal dance mode. This was 100% drivers error, I don't think "5 sec off" would have helped me at all.
First of all, I almost "Scandinavian flicked" it into the turn, coming out of the lefthander, It slid out a little bit where I should have stomped the gas pedal and driven it out. Instead, I went off the gas which probably made the right rear have even less grip, while the left rear having lots of weight on it and now engine braking. Perfect setting for sliding out!
What is a Thorsen diff even doing in that situation? Is it open or locking under braking like a 1.5/2 way clutch type LSD? I also don't know if "electronic limited slip" (which is disabled by PD) would have added brake input to the right rear? Nevertheless, I doubt it would have made a difference since the right rear probably played very little role at that point.
If I had acted correctly and gone on the gas and
still spun out, I would be more concerned if it would send all the power to the low grip wheel (due to lack of weight and no Electronic Diff to add a slight brake input). But that a bit hypothetical.
The way the car is set up now is not as forgiving as before. Now it has more front camber, toe out and rear swaybar is in hard setting. Also, I run slightly more cold tire pressure in the rear (which I don't know if it's appropriate for the low temps at that day).
I like that the car is more lively and doesn't push early mid-corner as before. If I go too aggressive on the gas in the beginning of the turn, the rear comes out a bit. Once I am settled in the turn with (I guess) settled forces, the car will push again, which usually is after the apex. This is the optimum fun balance for me, I just need to react to it correctly - and I generally don't!! Looking at the videos, when the rear steps out I countersteer correctly, but go slightly off the gas and it straightens itself most of the time. Here the threshold for that kind of incorrect correction was obviously exceeded.
That's why I need drift training. Not to drift, but to know it is okay to go on the throttle and see the effect in a controlled environment.
As Wayno wrote earlier, my previous setup was probably easier to be fast with, since throttle would just adjust the amount of understeer, so you could just "push it around the track".
Yes, the Gs are probably not very accurate as it is taken by Harry's Laptimer from the iPhone Gyros.
Most right-hand turns are banked, so it's normal to see more G's in those curves (in the other videos 1.3Gs). In this video, I do hit 1.3G briefly in the second lefthander in the Mercedes arena as well. So either it's showing too much all round, or it may be slightly off left/right causing rounding errors perhaps. I take these numbers as a rough value.