Cheeseburger Talk (Intro to Rosetta's C++ structure and major classes)
Pre-developer, Developer, RosettaC++
"Rosetta is a cheeseburger" is a many-times-recorded talk that goes over the structure of the Rosetta C++ codebase and the major classes. An extended version with algorithms exists too.
http://files.ipd.uw.edu/movies/rosettacon2018/4B.mp4