Tonight, after ukemi, tegatana, evasions, and hanasu, we got into Chain #4 again. We'd intended to get into Chain #8 but got sidetracked. This is a one-armed version of this part of the chain. This variation came up because Patrick M. doesn't have much function in the second arm to "cheat" with. The release comes as an explicit breaking of uke's grip and re-gripping by tori, similar to some of the motion in one of the higher Koryu kata (I can't remember which one right now, maybe Roku). Anyway, if the tenkai kotegaeshi doesn't work or doesn't feel right then tori moves into release #3, and in this particular film segment, wakigatame. Another option that we played with was this one-armed tenkai kote gaeshi followed by ushiroate. Something we all need to work on - and it is visible in this video - is both partners keeping the free hand between uke and tori. This guards tori and makes uke more of a threat.
Incidently, I found this website for an aiki school in Salt Lake City. Interesting stuff - looks like they are having fun. Check out their videos.