NASA ScienceCast - Countdown to Pluto
ScienceCasts, NASA’s new video series, offers middle and high school educators and the public a fast and fun way to learn about scientific discoveries and facts about Earth, the solar system, and beyond. The videos were produced by an astrophysicist and a team of agency narrators and videographers. The format is designed to increase understanding of the world of science through simple, clear presentations. The videos are available in YouTube, Vimeo, and available for download.
Keep check their website for updates. Below is the current NASA ScienceCast, Countdown to Pluto (January 13, 2014).