The Nobel Foundation makes available a great deal of material on each of the Economics prize winners, including video of each Prize Lecture since Robert Mundell in 1999. As well as a lay introduction to each prize winner's research, there are "Advanced information" links giving a more technical explanation. This link is to the Economics Network's quick index of lecture videos and related materials on the site. Each video is a full lecture (usually between 40 and 60 minutes) with good audio and video quality, and pitched at a non-technical audience. Transcripts of each lecture are available.
Comparative Economic Systems in Intermediate Microeconomics
Institutional Economics site containing links to course outlines for 30+ institutional, behavioural and heterodox economics courses, mostly in the US. Online access to Allan Schmid's working papers, and book 'Property, Power and Public Choice' (in English and Spanish). This argues the general case for countries' economic performance being affected the institutions that shape agents' choices and governments' policymaking, then sets out (and offers some secondary empirical support for) some hypotheses on the impact of different property rights arrangements.