I've never heard or seen Clark Pinnock speak. The below is a video from last year at the 2007 Open Theology and Science Conference, the title of his lecture being Open Theology (A Project of Love).

He sounds very weak and hesitant, I wonder if he could read his notes all that well. He also says he had prostate surgery 'a few months ago', so maybe that could be part of it.

The below is the first part out of seven (click on the link and see the links for the next parts if you're interested). I think the first four parts are the lecture with the remaining three devoted to Q&A.