Glen Gray and The Casa Loma Orchestra (1942)

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Glen Gray and The Casa Loma Orchestra — 1942 short film

The Wikipedia page on the band says:

In 1942, the orchestra made a Warner Bros. short film, Glen Gray and the Casa Loma Orchestra, that featured the songs “Hep and Happy”, “Purple Moonlight”, “Broom Street” and “Darktown Strutters Ball”.^[3]

The four songs performed (credits from IMDb and the video provider):

• Hep and Happy (uncredited)
  
• Purple Moonlight (m. Arthur Kent, w. Edgar De Lange)
  with unidentified male vocalist
• Broom Street (uncredited) — featuring jitterbug dancers Dean Collins and Jewel McGowan
  
• Darktown Strutters’ Ball (Shelton Brooks) — vocal by Pee Wee Hunt