This is really practical and environmentally friendly.
fuck. one episode?!! taking up a whole book?!! nobody stores just one episode, you have to do the entire series. people also tend to have more than one series of anime. now that's environmentally friendly!!
usb sticks and cds are convenient, but paper and gold plated bricks are reliable.
assuming no manufacturing defects, the usb stick should last longest of all the traditional computer storage formats because it is a solid state device.
if anyone can cite an instance of someone that has used gold or paper as a computer data archive in modern times (2000 or later), then I will concede that paper/gold is a suitable as a computer data archive. the reference must be from some reputable source and not just some guy's blog.