Demos by John Gillett made a couple years ago, intended for students:
- On BB Collaborate: http://pages.stat.wisc.edu/~jgillett/303/0overview/0_4_webConference.mp4
- On piazza: http://pages.stat.wisc.edu/~jgillett/303/0overview/0_3_piazza.mp4
Demo of lecture recording on iPad: https://www.youtube.com/watch?v=KefYRtjHxvU