how do you learn english?

i like to watch videos on Youtube, there are a lot of good videos from by nativeteachers speakers teaching how to improve your english, and the most of them speak very clearly, in a way that i can understand, then and i can get vocabulary, learn grammar, and improve my listening as well,. (period) I like to practice chatting with some friends, it helps me too fix what i've learned, and i also do an english course thru through the internet. and you, (comma) how do you learn?

Here are some more things to look at (besides the capitalization corrections noted earlier). 

how do you learn english?

i like to watch videos on youtube, there are a lot of good videos from native teachers teaching how to improve your english, and the most of them speak very clear, in a way that i can understand, then i can get vocabulary, learn grammar, and improve my listening as well, i like to practice chatting with some friends, it helps me too fix what i've learned, and i also do an english course thru internet. and you how do you learn?

Always start all sentences with a capital letter. The pronoun “I” must always be written as a capital letter. The word “Internet” takes the capital letter, too. And don’t forget to use capital letters for languages (and nationalities): English, Portuguese…