There are many metaphors in this short animation. One of which is that the couple’s life is like a nuclear war. The TV shows images of the ongoing war outside, which is a representation and parallel between that and the couples life. The image of the sad face and nuclear explosion shows us how the couple feels. They are sad and always at war with one another.
Another metaphor is the picture near the end of the clip. It is an old photograph in black and white. It shows you what the photo looked like in the past. It is full of colour. The love hearts around the photo used to be in colour, which show that the couple used to be in love.