Table manners of yesteryear

A new method of discipline (nay torture) I inflict upon my children for infractions in etiquette at the dinner table is to make them watch clips on YouTube from various finishing schools, etiquette trainers, etc. To my elation (and their dismay) I found the clip below from the early 50s:

To my surprise, both girls actually sat through the entire clip.  Afterward, the begged for a more kid-friendly version, so I found a Disney clip from the 70s? that they seemed to actually enjoy, and for about fifteen minutes they continued to watch clips on table manners. I don't know whether to be impressed or confused.