For full 43min version please see
sites.google.com/view/traditi...
Like most karate kata, Unshu's origins are likely traceable back to China (Sells, Unante; ISBN 0910704961). The most common of today's versions are derived from Aragaki (Arakaki) Seisho who lived in Okinawa from the mid-1800s, to the early 1800s .
The Shotokan "Nijushiho" version is a derivative of the Shito-ryu version, in a similar manner to the heaian kata having been passed to Funakoshi by Mabuni (however in this case Nakyama sensei played a key role in its transmission from Mabuni to Funakoshi sensei).
The kata is performed by Jason Armstrong, 7th dan with bunkai support through Renshi Jason Griffiths (5th Dan) to add Shotokan & Okinawan commentary to the Shito-ryu form/bunkai. Its heritage is covered and the video demonstrates the kata full power, walk through and bunkai (43min).