I wish I had of thought of this site as the concept of it is both  incredibly simple and useful.

The University of Nottingham has created ‘The Periodic Table of Videos‘which essentially explains what each element is, where it comes from and what it's properties and applications are.

Science teachers would love it as it offers large amounts of into in a short period of time, and it even has some learning tasks and resources associated with to take your lesson further. Below is the video sample for Hydrogen, my personal favourite.