I felt videos 2 and 3 were the most helpful parts of the article. I wish more science/tech articles could rely on graphical/animated explanations. After all, they do speak a thousand words.
If an image says 1000 words, those videos said about 1002 words, and showed up as blank spaces until I right-clicked and selected "play". (Before that, they said 4 words: "This site looks broken".)
