Info about "Ninjutsu video"
Ninjutsu sometimes used interchangeably with the term ninpō is the ancient art of the ninja shadow warriors of Japan. It is a unique method of moving and thinking which developed the system the art of winning, a complete fighting system dealing with the physical, mental and spiritual aspects of student development. Techniques cover locks, throws, ground fighting, multiple attacks, modern weaponry. And all types of traditional weaponry. In fact in Ninjutsu there is no restriction on the type of available technique you can add on to tai jutsu, the basic empty-hand defense method used (a branch of Jujutsu).
Ninjutsu did not come into being a specific, well-defined art in the first place, and many centuries passed before Ninjutsu was established as an independent system of knowledge in its own right. The Ninja, at the beginning did not use that label for themselves, they were merely practitioners of strategies that were cultural opposites of the conventional outlooks of the ruling Japanese Samurai class. Their highly illegal counter culture went underground and it was for this reason alone that the art was shrouded by centuries of mystery and deliberate confusion in Japanese history.
What was once condemned as an underground assassins technique, is today more recognised as a positive and powerful way of life in which harmony with nature, a working knowledge of universal laws and intuitive realisation of where the future is headed and learned through the experience of the Warrior Ways.
[From Wikipedia and ninjutsu.org.uk]