Basketball: one of America's greatest past times. It's a simple game involving two hoops, 10 players, and a basic objective -- to score points in your goal. Which is why what happens in this video is so confusing.
So, just to recap: the video starts off with a girl shooting free throws on her team's basket. She misses the second one, and the other team rebounds it and… tries to score on the same goal, which is not theirs to score on. Then, the team that JUST shot free throws on their goal seems to accept that their goal is no longer their goal and tries to score on the OTHER team's goal.
Either that, or one of the teams yelled "SWITCHIES" after the free throw, which as you all know, per standard NBA/WNBA regulations, means that the teams switch goals.