(ADDING FUEL TO THE FIRE) The never to agree-back and forth conversation would end if those that say its impossible would just say that they themselves are not capable of learning from video.
Personally its easier to admit my weakness than point out yours.
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Ah, well, that's simple then. All you need to do is provide us with an example of someone learning a traditional martial art by reading books or watching videos, without real live instruction.
I don't think anybody will accept Ashida Kim or Choson Ninja as valid examples...