You can access it on Moodle. under Module 4.
The actual discussion starts about 25min into the recording, so skip ahead.
A word of caution: The lecture discussion is NOT a lecture, it is not structured for recording => it does not make for a pleasant, smooth viewing experience. There are a lot of questions, interruptions, ad-hoc discussions, unrehearsed explanations that are distracting to somebody viewing this online.
So, please treat this recording the right way: as a last-resort backup in case you missed the actual discussion.