Here's three more along the same lines, enjoy.
Here are three interesting video lectures, I hoped to post more but I haven't found any more recently.
Eliezer Yudkowsky: The Challenge of Friendly AI - This talk introduces to the concept of Friendly AI by starting with some specific AI (chess player), going meta enough times that a Reflective AI becomes a possibility, then Eliezer discusses the problem of showing that a self modifying agents wont lose its morals.
Judea Pearl Tribute Symposium: Causality - A mathematical model of causality is sketched then its connections with probability and counterfactuals and belief propagation are mentioned and explained by example.
Shane Legg: Universal measures of intelligence - Discussion about the research and experiments on a particular computable formula Algorithmic Intelligence Quota that aims to be a step towards making the notion of intelligence scientific.