Rough English translations as follows:
2:04 JYP: You know, you guys are technically still in training--whose debut isn't even confirmed yet--and I totally forgot all that while watching you girls perform.
2:19 JYP: When the 3 of you were dancing--the angle of your arms, the speed of your movements, posture... everything... it's like the 3 of you were dancing as "One." (T/N: as in, the girls were completely in sync and seemed like one single unit or "person")
2:32 JYP: I felt, "Oh boy, this is gonna be good--they're gonna kick ass..."
2:37 JYP: ...right when y'all two--Maya and Rio--put on your jackets near the beginning of the performance, and you guys were doing it almost simultaneously!
2:46 JYP: Miss Rio--although all 3 of you did very well, the expressiveness of your voice stood out to me the most.
3:15 JYP: Even though you were performing such an exerting dance routine, you managed to continue breathing using your lower abdomen (T/N: breathing using your stomach, instead of your mouth/throat--this is how babies breathe and how we all first learn to breathe when born), and that helped your vocals remain vibrant and your pitch remain steady while singing.
3:34 JYP: Honestly speaking... what surprised me the most about this performance, to be honest... was how fast and energetic you were, Miss Maya!
3:45 Maya: I received power (T/N: as in, "energy" or "good vibes") from these two, and so my own power became brighter, and how my expression (T/N: her facial expressions, 'cause Maya kinda has that gloomy look/vibe, or to put it another way for English-speakers, RBF syndrome--no offense intended) became more and more cheerful is really thanks to these two.
3:57 JYP: Long story short--the only way a performance like this is possible is if the three of you get along well with each other, and practice hard together as one unit...
4:04 JYP: ...and for all that to happen smoothly, the Leader's got to do a really good job, and that makes me think that you--Mako--must have been an excellent Leader... good job.