Tim Berglund explains GitHub's approach to product owners and product development and how that can (or can not) translate to other companies.
Scott Chacon talks about the technologies that power GitHub (Erlang, Redis,...), and the benefits of Git as a version control and as a storage system.Also: ShowOff, Scott's JS-based presentation tool.
Tom Preston-Werner introduces Git and GitHub and answers some questions about GitHub's architecture and features. He also talks about its development process and explains that using Erlang was instrumental for making it robust. Kenneth Lundin then talks about the decision of Erlang/OTP team to move it to GitHub and how it helped increasing contributions from the community.
Chris Wanstrath discusses the state of GitHub's architecture, how GitHub is used and its impact on open source collaboration.
In this interview filmed at RubyFringe 2008, Tom Preston-Werner talks about how both Powerset and GitHub use Ruby and Erlang, as well as tools like Fuzed, god, and more.