7:56 could have tried to swing for game, by attacking without aliance, then attacking with the purple Loogamon (hoping it would die against security), so both Dorugora would have unsuspended and could have make those 2 last attacks. This scenario would have not resulted on a win thanks to the CoolBoy being on that specifc check but it was a gamble which would have resulted on the same game state anyways
The last play when Leviamon was played, 3 effects triggered at the same time, the Leviamon and the 2 biting crush. Turn player resolve first so he could play his own Leviamon and delete the Leviamon who attempt to destroy Ogudomon and then can't resolve. So Ogudomon can swing for game.