This is a duplicate of the newsreel item found in Pathe Gazettes issue 51/20 on the same tape – Film ID 1441.26. This item addresses the whole country, not only Scotland.
The film explains the necessity of the census.
In the first part of the film a map of Britain is divided into squares filled with men and women. The second part has close up shots of the census forms, with a voiceover explaining how to fill them out.