About 300 free episodes on American English
"Sozo Exchange — Where Adults Learn English & Exchange Ideas"
This is an American English channel. There are lots of videos on daily pronunciation with articulation, idioms & expressions usage, "tell the difference" episodes, quizzes, featured episodes, etc.
For example Daily Pronunciation podcasts are short lessons, each is devoted to one word, phrase or quiz. Pretty young teachers will show you the right technique of pronunciation and explain the meaning of the word or expression.