The Austrian School of economics, as described by Hans-Hermann Hoppe and Jörg Guido Hülsmann, is explained in an 11 part lecture series. The previous lecture can be found here.
This particular lecture focuses on praxeology. What is that? The term was coined by the famous Austrian school economist Ludwig von Mises. But it's meaning is a bit tricky to explain, but it ties into free will and the study of how human action relates to the idea that when a specific condition holds true, a particular action should be taken. That's not highly instructive, the video explains it better.