Honestly, I believe if Finland would dare to play more offensively in the OT, they would score the goal. Czechs were clearly waiting for the SO, having only one or two dangerous counterattacks. But good for us that the Finns were more or less waiting for it too.
Regarding the game as a whole: Finns had much more shots and scoring chances, that's for sure. Czech defenders weren't supporting the offense much and moreover were often unconfident in their own zone. But, on the other hand: Czechs had very fast and dangerous counterattacks, stellar goaltending (for the fist time) and they were simply effective. From the 60 Finnish shots (with the OT), so many just hit the goalie's chest. Plus, the Czechs dared to play with empty net with some 3 minutes to the end, which certainly surprised the Finns and demonstrated that the Czechs are not afraid to risk.
I am happy for the Czech team to win, of course, and don't understand the Finnish fans criticizing their team so much. The Finns played a skilful, high quality game, they were the more active team, hit the post twice etc. Their possession and rotation in the offensive zone was just terrific. They simply didn't score more goals, because the opponent goaltender had his day. This happens pretty normally in hockey.