This posts discusses not just the use of including Youtube videos in your classes, but specifically mentions the benefits of the Professor actually making the videos themselves. Short videos of a teacher giving a lesson, primarily in an environment other than the classroom, seems to be more engaging not just compared to lectures, but is actually more engaging than random videos by anonymous creators. I thought that quite intresting.
http://www.siemensstemacademy.com/?event=showBlog&c=35
