It's not so much what Hank Green said, but what the Hank Green-hosted SciShow on YouTube put forward. The video is framed as physicists using science to explain the art of knitting, which until now has been innovated simply "through trial and error," and that "how it all works was mostly a mystery." Recently, scientists used a computer model to determine how certain knit stitches will behave, thus being able to predictively pattern knit fabrics for the first time.
Knitting, once tied to blankets and scarves, now inspires furniture, lighting, and home accessories, showcasing its potential for creativity and function.