I thought that the first part of the talk that describes the problem was interesting: how to provide a uniform interface to things that have a similar meaning in similar situations so that they can be treated uniformly. I understood that the goal is to solve the "how do you make algorithms and resources from different libraries be able to take advantage of each other".
I have rewatched this and go back a bunch of times googling the concepts and while I haven't being able to fully comprehend this video yet, I learned a bunch of new things about programming and about cpp so I thought about leaving it here in case someone finds it interesting too.