So I realized there are so many things that can't be taught in trading.
One major thing I know can't be taught is the psychological aspect of trading.
No matter the number of videos you watch on this, you need to learn your psychology by Yourself! This is just a fact!
What other things can't be taught in trading?
I believe that emotion control must be one of the aspect of trading which cannot be taught from books nor from videos. We need to get practice to it only through our own experience. Recently I just come across a video tutorial about the emotional control which is teaching about going for practicing meditation for better emotion control while trading. I understand that must be a better way to get practice to emotion control other than experiencing emotion failures while trading and then learning from our own experience.
On-time decision making cannot be taught to one trader because traders must learn it by heart. Just following the signal which is usually derived from technical analysis alone will not assure success in trading but we need to take many timely decision so that we can avoid losses and also maximize the chances of making profits. Simply, at many times while trading we may need to take timely decision according to events and news; which may not be possible by learning from books.