Very true, if you have a mentor and he or she has a YouTube channel you can easily learn from there but searching randomly on YouTube will not give you the needed knowledge to become successful.I cannot name a YouTube channel for learning forex trading completely. But one thing I can tell you about forex trading or any other skill is that you can't find any random channel to learn a skill because most of the channels are just creating confusion and not delivering complete knowledge. They are just interested in getting more views.