I explored YouTube, Discovery Education and TeacherTube, as well as some of the major news networks (MSNBC, ABC News). I like the content and diversity of things on YouTube and they are usually pretty simple to download. Above is a cute song by The Learning Station that students can do as a brain warm up in Health Fitness. Some schools, like the one in the video, perform the funny song about body part location for parent nights.
This video reviews the scary statistics that we are faced with in the current obesity epidemic and reasons why some people think we as a nation have gotten to this point. There are numerous factors involved in body weight.
Most of the copyright and fair use policies have remained similar to some of the technology classes I had in college. If you remain on sites like picasa and other sites that you know are safe or require attribution, you should be good to go.
The Dropbox could be utilized in my classroom just by being able to use health and fitness photos on my home computer at school. It is a neat way to be able to share things without having to email them all to yourself.