Uke catches Ukes rear collar.
Nage demonstrates an exercise in the kaitenage movement, rather than the technique.
This is performed slowly enough to see the importance in turning the centre and also the effect of distance (close to Uke) while performing this turn. This allows the follow through to take effect.

Nage = Sensei Andy Lyon.
Uke = Sensei Mark Eastman.
Clip Ref=ka19