Shepherd's explanation to Hak was that another MTU player touched it prior to Helminen freezing it in the crease, therefore no penalty shot. I don't know where that is in the rule book, but it appears he's taking a Don Adam approach to making up rules as he goes.
The video review was to get the time on the clock right, although when junior saw it he had just enough time to make up some bs as to why he hadn't called a penalty shot.
At any rate, a perfect overhead video to show at future coach's clinics as to what constitutes a penalty shot call.
Players in the Sioux bench had some choice words for little Shep during the bench explanation, clearly picked up by a live mic on TV. F'n weanie I think it was.