The unnecessarily complexity is what's in the video: the user sees the icon, recognises it as a floppy disk, understands that the floppy disk is storage from some prior experience (ha![1]), and then reverse-engineers the question "why does this icon look like a floppy disk" into "something to do with storage - probably saving the document to it". It's a very convoluted and unnecessary cognitive path.
[1] Does anyone really believe that the youth of today learned what floppy disks were before they learned about saving documents?