http://www.youtube.com/watch?v=j70KLWg0nZo
I love this video and use it quite often to share the changes happening daily minute by minute. Injecting video is a great hook for students and definitely stimulates independent learning. However, if you are in a district without a lot of bandwidth this could be a problem. There are some tools available to download these videos to ipods and then use them with your computers. Definitely another option.