Riptide, postmodern?

One of the key ideas of postmodernism is nostalgia and this is evidently present in the Riptide music video. It can be seen where the lyrics match the visuals at the point in the music video where it shows a woman in the dentists and multiple times throughout the video where a woman is being dragged out from the light and into the darkness With the visuals and lyrics matching and being spoken in past tense where it says " I was " puts emphasis on the nostalgia being addressed.