Funny Old School Lunchroom Manners Film
I stumbled on this video at Archive.org. An amazing repository of free movies, films, and videos. This library contains thousands of digital movies which range from classic full-length films, to daily alternative news broadcasts, to videos of every genre uploaded by Archive users. Many of these movies are available for download. My favorites are the films made for schools in the 50's and 60's.
The best line is a narration moment is "Phil always enjoyed the lunch in the cafeteria. It tasted good and was good for him." Too bad that is no longer true.