I exclusively listen to The Great Courses courses on Audible. They're usually 20+ hours long, expensive but can be redeemed with a credit, and high quality. Th

I exclusively listen to The Great Courses courses on Audible. They're usually 20+ hours long, expensive but can be redeemed with a credit, and high quality. They have everything - music (Greenberg's How to Listen to and Understand Music is a classic), history, literature, and even self help or improvement. The Great Courses has its own subscription service which includes their video courses (many good ones on art history!), but it's a very amateur execution. The website and app are very poorly written, presented, and optimized.