There's something I've noticed in bts mv'. Whenever bts enters a new chapter or reaches an important milestone, there's always a door involved and they're always the ones opening it themselves. Maybe it's a small detail meant to show that nobody ever opened doors for them, and that they reached every stage of their journey through their own hard work
Wait… what if the horse symbolizes Jin from Jimin’s perspective? Horses are often associated with freedom, and Jin was the first member to regain that freedom after military service. Jimin looking at the horse could represent him looking toward Jin—the member who was already on the other side, waiting for the rest of them.
At the same time, Jin is shown behind the curtain, looking toward the horse. It’s almost like a parallel: Jimin is looking toward freedom through Jin, while Jin is yearning for the day the rest of the tannies can join him. The curtain feels like the barrier of military service and time itself. One side is waiting to be free, and the other is waiting to be reunited.