2 Player Productions has been following Psychonauts maker Double Fine for years now. Its documentary, Double Fine Adventure, tracked the crowdfunding and creation of Broken Age with exceptional depth. The twentieth and final installment is out now, viewable for free on YouTube.
With that, you can see the 12-hour run from the beginning with this helpful playlist. Or if you're not ready to commit, consider giving my favorite episode, Walking Around In Our Drawings, a shot: