Yes, I did notice that. It must have been quite a video. Nine rounds for two people and one for Myre, in the cab of a truck, must have made quite a mess. But I still find it weird that the three of them sat in the truck for 90 minutes before Myre suddenly went off.
As to who was the "mastermind", I'm not sure. It was he who cooked up the fake account statements for investors. It isn't clear to me who was doing the trading, but apparently not much trading was done. Myre also kept more of the money for himself.