The Periodic Table of Videos is a collaboration between the University of Nottingham's School of Chemistry and video journalist Brady Haran. They initially made videos about all 118 elements.
Tables charting the chemical elements have been around since the 19th century - but this modern version has a short video about each one.
They've done all 118 - but their job's not finished. Now they're updating all the videos with new stories, better samples and bigger experiments.