Databases by prof. Widom, from Stanford. Currently the course is at edX, and split into 5 mini-courses. Everything in the course is well thought out and apparently polished and perfected over years of teaching practice and experience. There is nothing useless in the video lectures, and the course homework probes every topic from the lectures.
https://online.stanford.edu/courses/soe-ydatabases-databases
Songwriting, at Coursera, from Berklee College of Music. The guy just sits in a dark room, and explains the process of writing lyrics to songs. He just explains it very well.