Of course I read your entire post. You say a number of things.
Among which is that someone can get their primary training from video.
You've got it backwards. training with a good instructor comes first, and then video can be used as a supplement/reference source. Not the other way around.
And it really depends on what video you use, not just whatever you find on the Internet, put together by some random person who is not connected to your school or lineage. Because there will be inconsistencies and that really does make a huge difference. I doubt you have the depth of background to understand that, but it is true, like it or not.