Earlier this semester, Robin alerted us to SciVee, an where you can find science-related videos online. Via Duke's Center for Instructional Technology, I was alerted to a couple other science video resources online:
JoVE is the Journal of Visualized Experiments, a video journal for biological research. Check out video articles on micro-scale engineering for cell biology, watch brain slice stimulation, or browse videos related to stem cells.
LabAction is a community-driven free site with videos on human genetics, experiments, biotechnology, biology news and more. What can you find there? Try the videos on childbirth simulation, DNA helicase structure and function, or mass spectronomy. Have a specialty? See if there is a video channel for it.