As someone who has a real respect for both acting and voice acting, I found the video to be fairly fascinating. The documentary sheds light on why old methods of recording voice work were flawed, while also explaining how important chemistry is when working with others. Indeed, as the saying goes, acting is reacting.
It was also really entertaining to see the actors getting to play the roles out, physically. As one of the actors mentioned, it really is like being a kid, where they have to tap into their imagination in order to fully get into their characters.