For this update, I did some more digging and discovered that The Mullinaires were all Mullins employees — they were officially “The Mullinaires — Mullins Manufacturing Corporation Chorus.” Mullins, being: the company that manufactured Youngstown kitchen cabinets. Above: One of the several awesome historic photos of The Mullinaires in the Warren-Trumbull County (Ohio) Public Library’s Trumbull Memory Project site. Here’s my guess regarding the purpose of the video: Filmed — with very high production values, not to mention the bouncing sing-along ball — to play at a salesmen’s convention. An instant midcentury Americana classic!
TGIF, it’s been a long winter. Let’s take it from the conductor, prepare to sing along:
“Now we are going to sing a song dedicated to Youngstown Kitchens, which is the theme of this whole program!
Now you join with us, let’s everybody sing:
Here’s the word, here’s the flash
That will roll up loads of cash
Youngstown kitchens are keeping the lead.
Diana style is the key
To our new supremacy
Youngstown kitchens are keeping the lead.
We make more history
In the kitchen industry
Sales records we’ll pile up by the score.
For we’ve led the pack
Now we have what others lack
Watch the public come running for more.
Sinks are sleek, cabinets smart
Kitchens new in every part
Youngstown kitchens are keeping the lead.
Built-in look, smart designs
Smoother flowing modern lines
Youngstown kitchens are keeping the lead.
We will make history
With new flexibility
Our kitchens no others can exceed.
Just watch us sell
Give the competition hell
Youngstown kitchens are keeping the lead.
Many thanks to archive.org for making this video available, and to the Warren-Trumbull Public Library for giving us permission to show this photo! 
Read our history of vintage steel kitchen cabinets —
70+ brands identified to date! — here
The post The Mullinaires sing the praises of Youngstown kitchen cabinets, 1953 appeared first on Retro Renovation.