The English Open University has an impressive YouTube channel. You’ll find more than a 1,000 uploads and they generated more than 15 million views. And that has a good reason. These short animated films are informative, entertaining and also have a stylish retro look. The narration has a characteristic accent and the general motto is short, short and short. Virtually every film ends with the option to attend a course at the OU. That must be effective to yield subscribers.