I only found out yesterday that there is a "periodic table of videos", where each of the currently known 117 elements has its own little clip. You just click on the relevant square in the periodic table and you get the 3-minute introduction to the element. Genius. The structure of the clips I've seen is quite elementary as well, though. Basically they cut back and forth between Professor Martyn Poliakoff sitting behind his desk with a periodic-table themed tie (and matching mug), waving his hands and explaining the more academic side of the topic, and a younger scientist in the lab doing something with the element in question and giving additional explanations.
So maybe I wouldn't want to sacrifice five hours to sit through all 117 elements, but it's well worth checking out a few.
PS People in the UK may recognise the name Poliakoff -- his brother Stephen has written lots of stuff for stage and TV.