Pillars of Eternity is a deep and time consuming old-school RPG. Between the reams of text and challenging real-time combat, it could take a normal player upwards of 80 to 100 hours to complete Pillars.
Speedrunner Jiseed envisioned a slightly quicker playthrough. Using a number of glitches and exploits, Jiseed manages to bypass massive chunks of the game and rush to the end. His playthrough clocks in at 39 minutes and some change. The video is obviously very spoiler heavy. So if you intend to play the game at a normal pace (and you should), you may not want to watch past 6 minutes or so.