Info overload alert. :lol:
All that's set in Ninjutsu is the basic principles. The principles are based on the 4 basic elements earth water fire and wind.
For example, earth movements are very small, low and solid and usually involve introducing people to the floor in a very direct manner, There are two earth techniques in the videos..the second and fourth ones.
water is very defensive, it tends to involve movements that move away from the attack, then crash back in, like the waves on a beach. That's the first technique on the videos
fire is aggresive, It largely involves just smacking the **** out of your opponent, using anything you can. The last part of the first technique is fire.
and wind is evasive. It tends to be ducking out of the way and moving around your opponent so you're to the side or behind. That's the 3rd video. It's the hardest of all the elements to master.
You learn how to move/think in each element. You learn loads of techniques but there are no offical techniques that have to be learnt in a specific order. All those videos are of basic beginner techniques.
As your ability to use a certain element increases you will go up in grade level. You need to demonstrate techniques along the way to show how the element is used, but like I said, they aren't really fixed as such.
Then you learn how to blend the elements that's up to about brown/black belt
Then you learn to develop the ability to move without thinking about which element you use. By that time it should become second nature. That's round about black belt level up to 3rd dan.
Then your body needs to just react, on it's own to whichever element is the most useful at that time. It's a weird feeling but you body just moves where it needs to. That's up to about 5th Dan
After that you just improve on what you've got, constantly trying to get the same result with less and less effort and movement. You need to have mastered this by 8th Dan, then you become a master.