I was going to try to ignore BTS. I mean, they're really good for a seven-piece boy band.
This song is popular because an American of Japanese descent remixed it. And let's be clear - this song was a big hit. It made mainstream pop radio Top 30, which is rare for a song with very few English words. However, BTS is pretty front-and-center in this very visually-interesting video. At the end of the day, Steve Aoki's remix gives the song some polish, but their singing and dancing skills carry the day.
Also, no, guys, I have not seen your bag.
Incidentally, this song does exist in a version without remix. This Japanese version of the video shows a side without Aoki.