I often feel reluctant about taking advice from Youtube videos. Often the people who made them are enthusiasts, not experts. The ones I've seen in my professional field (made by amateurs) are often either misleading, plain wrong, or lacking in informational value. Interestingly, youtube, as a hosting platform, also has videos of real experts in my field speaking on the subject of their subspecialization, and these videos are never popular. It seems that people as a whole prefer bad information to good.