It was an excerpt from a film made in 1937 with Yasha Bunchuk and his Cossack Choir from Moscow.
Bunchuk (1896-1944) was born in Kharkov. He composed his piece based entirely on (of all things) the word "Massachusetts." It was pretty ingenious.
Additional information about Bunchuk and his choir is hard to come by. I was hoping that YouTube would have this video, but it does not.
There is a short film with Bunchuk from 1936 by Fred Waller titled "Moscow Moods" listed on IMDb (The Internet Movies Database). It was nominated for an Academy Award. Other than that, I can find little information is online about this talented artist.
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