In this video, pay attention to a particular point (the :57 second mark) in the video. One of the students was applying a kote gaeshi defense, when suddenly the uke evaded the application by pushing the wrist forward to evade it. Once the attempted kote gaeshi fails, an immediate follow-up technique is required.  A throwing technique (nage waza), was the chosen follow-up technique for this exercise.  The throws were all supposed to be applied with a one handed kote gaeshi waza…not switched to a wrist hold (for typical throws a.k.a. nage waza).  Switching the hold gives the uke the opportunity for escape, a possile counter attack (gaeshi waza), and takes added time.