Okay so here my theory ....

well actually it's my friends but i helped her so credits to her

it's probably wrong but i want to have a go at it too .....

Jin is the only one who DIDN'T DIE! .... he's the only one alive and the rest of them have died and gone into parallel universe. They all are refusing to believe they will never be able to be together again.

okay so the parallel universes: Jimin and J-hope are in one and that's when they are having the pillow fight and lying in the feathers, it looks like they are all having a pillow fight but its just those 2 imagining it. Also they are in a hospital room because they had an overdose on medications ...... 2:03-2:20

V and rap mon when V is spray painting the walls and they start to run away .... V drows and Rap mon dies because he set the petrol station on fire..... 1:16-1:26 and 1:30-1:33

Jin is the only one alive (as i said before) - when he for instance picked up all the boys in the truck, they weren't really there and the only reason the drivers on the road were getting irate was because he was blocking the road. 3:57

Suga and Jungkook - when they are fighting in the room by themselves .... 2:25-2:50 suga dies because he set the room on fire. and jungkook.... well, ...

Jungkook is the only one out of all of them that has accepted the fact that they are dead because he was the only one who was in a ACCIDENT, when he was run over by a car. That's why Jungkook keeps looking at Jin and at the end he smiles at Jin, as if he is reassuring him that it's alright.

Oh and right at the end of it all they took a picture right? Anyone else noticed that the picture Jimins burning doesn't have Jin in it? ............ see for yourself.... 7:15-7:20 yeah that's basically it ^^

THAT IS PROBABLY SO WRONG I AM SO SORRY BUT MINE AND MY FRIENDS OPINION

https://www.youtube.com/watch?v=5Wn85Ge22FQ

also I LOVE THIS SONG!! <3