While there’s a lot to be said for the added value that video has to actually show facial expressions and gestures, audio can be better than video in many respects. First, the file size is usually much smaller, taking up less space on the server and allowing for faster download on slower connections. Second, preparation is easier – when I prepared seventeen video lectures for my cyberethics class (or even those short videos I did for the Producer presentations you saw near the bottom of this page), I went through several retakes on each one because I didn’t like how much I looked away from the camera back to my script – in audio, you can read directly from your script and, if you do it expressively, no one notices. Third, audio is more transportable in that it can be downloaded onto an iPod or CD and engaged on the road – literally - since it doesn’t take up visual space, the listener’s eyes are free to focus on driving.