First of all, he didn't win 300,000 euros because he shows his account afterwards and he appears to have won 250,000 euros, which is still a lot.
Second, wtf? I imagine that if these spin n gos are anything like Jackpot Poker they *eventually* become shove fests. But he turned it into one super quickly, despite the huge sums on the line. So he FOLDS the 2nd nuts holding 37h on a 4568hh board, meaning he either decided not worth the call to split with another 7 or that he was beat by the only hand better 79. And then basically the very next hand (or maybe two) against the same guy ships it aipf with 67o to the shorter stacks broadway cards (like jk?), spikes the 6 on the turn and holds up. Then almost immediately shoves again aipf with a2o and runs into 44. Does he win with the ace either hitting the ace or a 4 card flush? No, one of the two remaining 4s come to give him the wheel and the victory.
PLEASE do NOT show this to any politician trying to decide on legalizing gambling.
I mean, congrats and everything. But like most Russians I have played with, you basically were just a lucky f***