So when I entered the cryptosphere around 7-8 months ago, there weren't as many youtubers as they are today. The first video I saw was of Vincent Briatore. He was explaining how he does his trading, what is his strategy. He basically pumped me up to stay in the game. I have found him to be one of the best youtubers even today.
Do check out his channel, I promise you won't regret it.