For a year now I have been slowly learning English with my little son. And as a result now he understand English cartoons and simple speech very well. Often we watch cartoon and other YouTube stuff together and here is the list:
Mad English TV
Actually not so mad 🙂 Canadian guy explain his real life. Very useful channel for your vocabulary. Extremely understandable pronunciation (for me, as for native Russian speaker)
Technical gadgets lovers channel
Many stories with book-style cartoons.