Laferriere's goal.
Dubois clearly makes contact, and the goaltender has about as much time and freedom to position himself to the rebound from Laferriere. Challenged, not considered goaltender interference.
Gudas' goal.
McTavish is standing in the crease tussling with Lindholm, Ullmark himself is out of position. Rebound goes off of Lindholm's skate and in. This one is probably borderline because it goes off of Lindholm, but depending on how vindictive the ref is you can make you argument that McTavish's presence in the crease prevents Ullmark from making the save. Challenged, not considered goaltender interference.
In the first case, the player was outside the crease when the shot was taken. The player's contact with the goalie did not impair him from making the save, nor could the player himself have impeded the goalie illegally in the process of making the save since he was outside the crease at the time of the shot.
In the second goal, McTavish is in the crease because the defender pushed him in. You can see at the :10 mark that McTavish is skating to the front of the crease. The defender stops him and puts his shoulder into him, forcing him into the crease. At that point, he's legally allowed to be there and just has to avoid making intentional contact with the goalie.
Neither fits the circumstances of the goal last night. The first one is closer, but still isn't relevant because the player is out of the crease when the shot is taken.