"It takes a Village: Lessons on Collaborative Web Development" by Harald Kirschner https://www.youtube.com/watch?v=THTONE33mD8
There is some really neat stuff coming up in the Firefox Dev Tools. Skip to 20:50 and see a really amazing demo of time-travel debugging. The moment where he adds logpoints and it prints a console.log *for previous points in time* blew my mind.