Mike Sigman had a series of three videos on "Internal Strength" years ago. I believe he pulled them from the market eventually (you'd have to clarify that with him, I'm going from a shaky memory). I do not know where you can find them today although I'm sure you could search around.
I have them, but even Mike himself is kind of ambivalent about them these days, IIRC.
I agree with Hugh, what you can see in video is generally not that useful unless you already know what to look for to some degree. We've got lots of video of Ueshiba and it doesn't seem to help folks all that much.