Re: walking in a circle technique??
I have seen 2 major variations of this, and you just described both of them. The one in Janet's video is the one I have seen in dojos descended from Tohei sensei, where you walk uke around in a circle. I have also seen ones where nage essentially pivots on their front foot, which creates a much smaller circle. The dojos I have trained at tend to do it the latter way. Either way, there are some very subtle nuances to it, and it will take a lot of practice. Like many things in aikido, this is a really basic element, but it is really difficult to do well.