Traversy Media is a channel by Brad Traversy. Brad is one of my favourite YouTubers and has a great teaching style. All his videos are at the right pace and he always makes sure his content is up to date.
This is a YouTube channel that has some really good bit-size videos. I often download them and watch them on the train into work due to their length. Mosh also has some longer videos and content around other programming languages (Python for example).
A YouTube channel that I started following about half a year ago. David and MPJ are mainly talking about everything except coding for 90% of the videos and almost every video they fail in what they were trying to achieve. However, that is the good part of it. It shows that programming is hard and you fail more than you actually succeed.
This is such a great YouTube channel to subscribe to if you are really new to programming. Masha has several really good videos that help you with understanding the Web a lot better. She also recorded a few really good video with people in the industry which should give you a good understanding of how it is to work as a developer.
Kent C. Dodds focusses solely on React and especially on testing your code. He's the brains behind the React Testing Library which is a very popular package that helps you with testing your React code. On his channel he has some great videos for those that want to dive deep into React, the new Hooks API, and code testing.