This is an improved and more accurate version of a video they made a few years ago.

This video answers the question: "In the distant future when our descendants colonize other star systems, what is the theoretical maximum limit on how far we can go?"

Is there a border we will never cross? Are there places we will never reach, no matter how hard we try? It turns out, there are. Even with sci-fi technology, we are trapped in a limited pocket of the Universe and the finite stuff within it. How much universe is there for us and how far can we go?