What were some things you noticed?
My observations:
- GD's rainbow-colored umbrella and hair symbolized the light that comes after tough times, triumph through adversity. Of course, because after a rainfall comes a rainbow. There's still life after hardship. He takes on the role of a director on a film set.
- Taeyang's scenes are very biblical. I think I see a Noah's Ark reference. Note the ship. It's very true to who he is as a Christian man and now a husband and father. Noah was a man who believed in God's glory and trusted God, so he survived the hard times. Noah endured hard times and ultimately realized his perseverance was worth it.
- T.O.P.'s scene was deeply about isolation and loneliness. We know about what T.O.P. had to deal with. Not only did he face scrutiny from society, but he always felt a bit like a misfit. He's out in outer space while Earth is in the background.
- The only symbolism I noticed about Daesung's scenes was in the beginning, when it turned from black-and-white to color. His hair texture also changed. Obvious symbolism for growth and transformation.
As long as 
