Apparently the video you posted is private now.......

But I think I get the jist of the video from the posts.
I bought the NANO back when I was first introduced, and there was a big issue going on at first about how easy the NANO would get scratched.
A class action lawsuit was even thrown at Apple because of it. I don't remember the outcome of it all, but shortly after I bought mine they started shipping protective cases for the nanos (originally they came with nothing)