Reading books and material is very good for trading. However, real learning comes from applying what you read. I prefer small videos over books because they cut unnecessary content. Quality is a lot more important.
Being in the field is the real thing then after that you can talk with experience. If we only do book reading, the trade will swallow up everything we have when we go in . Like you said it is better not to only read but to try out the real thing which is trading. Watching trade videos on YouTube is also not a solution alone but to trade. When we trade there is another experience that comes to it because it is real money and not rhetorics of trade. Emotions and just watching or reading won't give same action to trade.
it is true that trading is an action, but theory is like reading a book that becomes our basis for taking action, the more transactions we make, the more experience we will gain, the more experience we will automatically be able to feel the market movements that will occur, and it happens like a natural, because we seem to always learn from the market