I would assume like every other sport if it's not 100% clear then the call stands.
Bad assumption.
I think we've all seen more than enough NCAA and NFL calls in which the video evidence was indisputably clear to all but indescribably the incorrect call is made.
Last night's call could have been settled either way and it would have been okay. However, as another user stated, no NHL analysts have suggested it was a bad call to overturn that goal.