The article links to a page with this video embedded in it, which I found very helpful. I'm not in this field and this was the first time I'd heard of Gaussian splatting; the original article sort of assumes you're not a rando coming to the page from Hacker News, that you are sold on the idea already, and use it so much that you need to worry about optimization.

https://www.youtube.com/watch?v=T_kXY43VZnk