How to Make a Tennis Ball (also it's impossible to make a tennis ball)

A video like this - which is beautifully shot and fascinating - is the kind of thing that further convinces me that the complexity of the world has reached the point wherein a global collapse of basic infrastructure would lead to the extinction of so many things.

Like tennis as we know it. 

Watching this video convinces me that making a tennis ball would be nearly impossible if we had to start from scratch.

Let's hope we never have to start from scratch.