Just because someone can play an instrument and knows how to make YT videos does not mean they are a good teacher. One thing a good teacher is able to do is empathise and in so doing helps the student to advance. Not many people have that ability. I always find it somewhat amusing that a 'teacher' says he can teach you how to play an instrument in a matter of hours or days. It takes years. There's no shortcut.
Somewhere between right and wrong there is a garden. I will meet you there - Rumi