The video shows that there's a gaping "chasm of ignorance" that physicists need to fill in before we can truly understand how the Universe works. This includes things like dark matter and energy, which work in theory, but so far have never been directly observed or explained.
The bottom line in all of this is that, the more we learn, the more we realise how much we have left to discover, and that's one of the things we love the most about science.
So, for anyone who's ever hurt their brain by trying to think about what the Universe is expanding into, or what exactly space-time is made of, this is for you. Because when the history of physics is broken down into a palatable 8 minutes, it suddenly doesn't seem so scary after all.
Now, check out the video below, and go and use your newly minted expertise to impress some dinner table conversationalists.