Allow it. (Score 1)

My professor offers audio only podcasts and they are very helpful. I attend class so that I know what he is writing on the board, and it is easier to understand and stay engaged. I also sometimes have conflicts and I need to make up the class and being able to listen to the podcast is wonderful. The students that just watch the podcast will probably not be able to remember the information as well and will eventually not succeed like the students that attend class.