Ako Suzuki, a well-known sensei on Twitter, has about 20 years of experience teaching Japanese. Last year, she created the YouTube channel Ako Nihongo Lessons and the podcast 日本語 with あこ as a new challenge.
Ako-sensei's YouTube channel has videos for all the JLPT levels, with a special focus on levels N2, N3 and N4. And さすが Ako-sensei, the quality of her lessons is very high. It doubles up as listening and vocabulary practice, so it's definitely a channel worth subscribing to!