Freesciencelectures.com organizes lectures and science video clips by categories. There are clips of DNA Replication, an octopus eating a shark, planets and stars to scale., and a few lectures.
Applications for Science Teachers: I have not spent a ton of time looking at this site but it seems most applicable for middle school and high school science teachers. Most of the video clips seem to support secondary science concepts. Many of these video clips would be supportive of classroom instruction and could be easily embedded in a classroom blog or a student’s report.