If you are a non-major and want to know the basics of http, this is a must-listen lecture. It teaches in an easy-to-understand way that makes you wonder if you really are a non-major (the explanations are so good that you can easily finish it in 3 days). After listening to it all, I feel like it would have been a very good lecture to have taken before studying the API part as a front-end developer. (Of course, I am not like that, so I struggled a lot..ㅎㅎ) Anyway, it is a really good lecture and I highly recommend it.