Well a friend of mine told me a theory of hers about this MV so I'm just gonna share it.
The MV might be showing V's perspective from after jumping into the sea in the prologue video. Have you all know that there's a 7 minutes of brain activity before total death?? and that 7 minutes is used to recall treasured memories. Well haven't you guys noticed that the MV is almost 7 minutes before the credit?? So it's like V's trying to recall precious memories with the guys. It's like a flashback while he's drowning. Those memories are still correlated to their death. Like Rapmon and his lollipop which signifies cigarettes (first scene) JHope and his narcolepsy (When Jimin woke Jhope up) Suga and his lighter. Jungkook when he fought with Suga (Remember Jungkook was beaten up in I Need U MV) And if you noticed at 5:06 Jungkook was looking at Jin who was inside the car and it looked like he will be hit by a car (Remember he died because he got hit by a car) Then Jimin inside the bathtub. Lastly is Jin. The story still revolves around him. Look at the time when he was stacking the cards then V just destroys it, Jin looked like he realized something. He was reviving the memories he had with the boys but suddenly remembers everything. That his friends were gone and he's the only one left. Which explains why he wasn't in the picture that Jimin burned. It means that the rest are already in heaven while Jin was still alive. Remember the teaser photos where the rest were barefoot while Jin had shoes on. Remember also the last ending in prologue video where Jin took out a polaroid pic from the compartment and saw that he was the only one in the pic but Suga was supposed to be in it. Big Hit changed it but I think most of you saw it.