This video is a compilation of snippets from a new DVD that Salahuddin Muhammad (Hontai Hakkei Ryu Aikijujutsu) has been working on. It explores some of the principles of applying internal method (aiki) to neutralize and counter waza such as kotegaeshi and nikkyo/nikkajo/kote zume. Although the video is a promo for the DVD, IMO it contains enough interesting information to be useful in its own right. Enjoy.
https://www.youtube.com/watch?v=oUipXlXnFjY