I dont think it showed the band were popular, they would have been very much part of an underground scene.
Yes but the point being made, is that the arrangements and style in jazz heard, wasn't around in 1933.
The top Afro/American band in the States in the early thirties was Fletcher Henderson, playing this sort of stuff. Many like his.
Which wasn't what we heard tonight. It was more like a swing band, which didn't start to get popular in America until the late thirties and forties.