Watching YouTube videos is a very easy and fun way to learn English quickly, especially to improve Listening and Pronunciation skills.
On YouTube, there are many things to watch for everyone with different backgrounds and interests.
So find something you love! Interest in content will accelerate your progress in language learning.
Do not be a mere viewer when watching English videos on YouTube. Rather, you need to pay attention to pronunciation, accent, phrases, idioms and the degree of formality in conversations.