6:46 JYP is always do that, put the chorus on the teaser video thats why i Always avoiding the Teaser, especially "Teaser 2".. Teaser 1 is not spoiling much but you can get the hype about the song too, idk tho the marketing i think they try to lower people expectation or something and when the full song come out they'll be surprise with other aspect of the song
You're so right. A teaser would be good to showcase a part of the instrumental or maybe the music video but the best part of the song should remain of limits