Video lecture

It is becoming indispensable in teaching science the use of video clips to make a point. More time should be used in class to solve problems and more time outside class should be used to read about the theories behind the concepts and to watch videos to enhance the interest of the student. The following video
http://www.youtube.com/watch_popup?v=EEu42L0ufBY
is a great example of what people can do.