I used to not be accustomed to learning through videos and podcasts, and I also believed that classroom learning and online learning were very inefficient. I thought only exploratory self-study could maintain maximum efficiency. However, recently, while listening to some podcasts during exercise, I unexpectedly found that seemingly inefficient audio/video content, with shorter scripts, actually works quite well because of the different way the brain processes them. Some good podcasts include: Silicon Valley 101, Zhang Xiaojun Business Interviews, and Half Latte.