Nationalism Intro

The nation-state is an area where the cultural boundaries match up with the political boundaries. The ideal of 'nation-state' is that the state incorporates people of a single ethnic stock and cultural traditions2However, most contemporary states are polyethnic. Thus, it can be argued that the nation-state "[...] would exist if nearly all the members of a single nation were organised in a single state, without any other national communities being present. Although the term is widely used, no such entities exist"

While watching the video on Kingdom of Germany what elements of  a "Nation-State" as defined by the United Nations are present?

Kingdom of Germany