"We are made of star stuff": The Origin of the Elements (Part 1 of 2)

Where did Hydrogen, Helium, and all of the other chemical elements in the Periodic Table come from? Where and when did they form? Where are they still being made in the Universe? This is part 1 of a 2-part lecture exploring the origin of the chemical elements from the Big Bang to on-going stellar nucleosynthesis. A compelling scientific answer must explain in detail not only the origin of the elements but correctly explain their relative abundances.
Recorded 2015 August 11 by Prof. Richard Pogge, The Ohio State University, as part of the Astronomy 1101 GEOnline project.