This is an interesting little video. I have done a lot of training like this when I was living in Japan and training in Daito Ryu. Recently I got a dose of this type of feeling while training at a Daito Ryu intensive. It was called, "the do as little as possible game." In the above film we see the man making a semi circle though his partner. I think he could even make smaller circles through his partner using even less arms. I like this type of training. I needed to step away from it a for a few years before I could really understand the value of it's subtlety.