Hello! These are my personal favourite youtube channels to learn full stack web development. Although numbered, this list is not in order of preference and all of them are equally great :)

1. Net Ninja

Shaun's channel has premium quality courses for free! Be it React, Node.js, Vue or Firebase he has covered it all. There are categorised playlists for all topics and he covers everything from absolute basics without skipping anything. Sometimes you'd wonder how am I not paying anything for these courses. Definitely check out this channel!
Net Ninja YouTube Channel

2. Web Dev Simplified

This channel does exactly what it says. Simplifies the web for you! Kyle has a complete full stack course for free on his channel. There are plenty of short videos explaining different topics in a crystal clear manner. I personally watched his channel to learn topics like authentication and react hooks which were easy to grasp.
Web Dev Simplified YouTube Channel

3. Programming With Mosh

Mosh is hands down one of the best teachers I ever had. I learnt React and Node.js from his premium course and not even for once I was lost. He also makes us write code using the best practices which is really beneficial. The way he explains is unique. He could even make a 10 year old understand what React is! He uses animations to make difficult concepts easy. I highly recommend his premium courses.
Programming With Mosh YouTube Channel

4. Brad Traversy

How can this list be complete without Brad! One of my first teachers in web dev, I have learnt all the basics of web development from him. He also has paid courses on Udemy which are worth checking out. Apart from development, he also makes videos on other skills like freelancing and life lessons on dealing with impostor syndrome and mental health. He has been a huge inspiration for all the web developers out there and I hope his channel continues to grow.
Brad Traversy YouTube Channel

There are plenty of other channels who make great content for the community. These are just my favourite ones. Please feel free to share your favourite channels!