The mic on my little recorder isn't great. Though its digital you can almost hear a faint sound of film churning.... You may have to turn the volume on your speakers up. Also, I didn't have a tripod, so I was sitting there in the audience holding the camera as still as possible. I think I did a good job, but toward the end of the lecture my thumb cramped up and there's a moment of jumpiness. I also, apparently, uploaded the videos as different sizes, so I hope they work for you on your computer.
At some point, I'm going to chop the entire video into manageable portions, and get them on the department website or YouTube page. So these are just a teaser. I'll let y'all know when that happens.