Sort of a misleading title, as it's actually a fairly wide-ranging interview with one of the Github guys, and an Erlang guy from Ericsson.
If you search the page for "You mentioned you used Erlang in GitHub." and click the link, it'll fast-forward the video right to where they they talk about what's mentioned in the title.
I thought the whole thing was interesting, and read it all. I don't have time for videos, generally.