Dear Can't Wait,
I looked at the video, and the clip seems to be at the end of a wonderful evening of music, and everyone is feeling beautiful and free. The lady in the short-sleeved shirt has just mentioned someone told her she has a nice 'rack,' and by that I think she is saying someone gave her a compliment for her bosom.
Just after that the man in the long-sleeve black shirt moves his hands in front of her chest, and I think he is just agreeing, he is acknowledging that yes he agrees that she does indeed have a lovely body and bosom.