In my opinion, the girl of the video decides to take off the mask for one reason.In a part of the short film the main charchater is in a class of philosophy.And the teacheris talkiing about Plato’s allegory of the cave.(a human community closed in a cave that did noy know another kind odf life,until that one day they came out to discover world).Another thing to see is that if you have a group of friends you wear a mask but if you go with another group you need to change your mask.Depending on the mask are you wearing you are more fashionable or less.Returning to the mai charachter i think the director did a methapor with plato’s Allegory of the cave.