So, what happened:
The on-ice official sees the contact as the goalie tripping the opposing skater and puts her arm up, calling a penalty. But then the opposing team scores, and she immediately points at the net - good goal, on a delayed penalty. This is what anyone who knows the rules of hockey can tell from her signals. To interpret it in any other manner requires mind-reading skills, and I unfortunately don't possess those. (But it appears some here do.) If it had been a goalie interference call, she would have blown the play dead there and then and waived the goal off, not after the review. Sure, the crowd might have been riled, but not nearly as riled as they were after the lengthy review. And absolutely no one would have been confused about what the call was.
However, what the on-ice official saw as a penalty against the goalie, the video official saw as goalie interference. She can't call any penalties based on it - only the on-ice official can - but she can disallow the goal after review.
So it was, basically, the on-ice ref and the video ref disagreeing on the call. The video lady used her powers to disallow the goal based on how she saw it. But the zebra still disagreed and let the original penalty call stand, as a tacit protest.
What the situation did was expose a bug in the rules. Now they need to amend it. I see they could go two ways about it. Either, A. Take away the video official's power to call goalie interference if the on-ice official calls a penalty against the goalie, or B. Grant the video official the power to call and overturn penalties on the goalie (but not on any skaters, obviously, that should be left to the on-ice refs). Option A could be further amended by letting the video official to summon the on-ice ref and argue his/her case against it, maybe even letting the on-ice official review the tape themselves, but ultimately the call should be left to him/her.
With one of these amends, this situation would have been either A. a good goal, and Team Finland could have gone to sauna and got drunk (though something tells me they did it either way), or B. the goal would have been waived off and the play would have continued on even strength. What would happen either way is that we peasants would be debating whether the call was correct or no, but at least there would be zero confusion about it.