Josh Gold leads a hand movement practice session with two dojo students. In randori, one should throw the attackers at every opportunity. However, there are many moments when a throw is unsafe or not possible due to the speed or positioning of the attackers. In these case, we use hand movements to clear an attack and reposition.
This video highlights a training drill in which the defender uses only hand movements to evade and reposition (no throws). The exercise is practiced using a large open mat space and later using only 2 tatami (a 6 ft. x 6 ft. square) to move within. You can see how practitioners with different body types and skill levels (4th dan, shodan, and 2nd kyu) navigate the exercises.
In "Hand Movements: Instructor Training", Matsuoka Sensei guides dojo instructors through a set of tactics to employ when using hand movements in this kind of randori practice. You can see some of the tactics Sensei outlines in that video put to use here by Josh, Billy and Karen.