As of this listing, this video is available for free on Youtube. I do not guarantee that the video is still available for free at the time of your purchase. Please check to make sure you have access to the video before buying.It has been my experience that if students do not have anything to do during a video, they do not pay attention. However, if you have them take notes or answer questions with written answers, they are too distracted. The purpose of a video should be to enhance learned mater