Mr Barnett,I fully agree Close and Grab.
Parrying only allows a return path or a realignment to continue with other strikes.
Take what the opponent gives you and do not allow him/her to have it back until it is broken or some other injury is inflicted.
Here is another clip from ICS in which they control.
http://www.youtube.com/user/BattleHand#p/u/6/5guLuy-XyMYAs said in the clip , they are teaching principle over technique,(which I agree with).
As when one learns the principles over specific techniques one finds the principle allows for similar actions to be applied to varied weapons,more than just knife techniques,as the principles apply to hand held swung or stab action weapons such as bat,stick,bottle,chain,pipe,sword,ax,what ever.
As long as one follows the principles of closing inside the elbow articulation point or the arch of the weapon and control the hands/limbs which control the weapon.
I agree the clip is not impresive as a stand alone clip.
People should look at what they put up as clips to represent what they do from an outsiders point of view.
Then again many of us,on forums like this,know what is good and what we are looking at,many looking at the clip as it is will be very impressed at the basic simplicity.
Control of the limb holding and controling the weapon is paramount.