Basically this whole class was about what I call 'the swinging single.' This is the first take down I ever learned with any real confidence. What's more, if memory serves this was the first thing I ever taught at Infighting way back in my blue belt days. Lucky for you I was able to find the original video I learned it from. As a small bonus, Gunnar Nelson is the Uki. Watch all the way to the end for some live examples, some of which are better than others. The one in jeans in the park at the end is the best.
Here is the same technique from a different instructor, in case you don't like scandanvian accents.