This video can be whatever you want it to be. Space porn? Yup. Education? Yup. Inspiration for your next sci-fi setting? Oh yes.
The term to take away from this, I think, is supercluster. The plot device to borrow from the video may well be The Great Attractor. My evil GM mind is already a wash with possible sci-fi (and horror) stories involving it.
Rather nicely, the word “Laniakea” comes from the Hawaiian language and means “immeasurable heaven”.
What sci-fi plots come to mind now you’ve watched the video?