These are the high speed naginata attack videos.
Kesagiri, followed by lateral reap (Overhead view)
Kesagiri, followed by Gyaku Kesagiri
Kesagiri, followed by lateral reap
All of the above are Araki-ryu Naginatajutsu techniques, performed by Ellis Amdur (tachi) and Aaron Fields (naginata). Video shot by Nathan Pegram. Camera courtesy of Intellectual Ventures Laboratory.