The message in "Be Up to Date" is, essentially, that Hillbillies are stupid. It's not exactly the nicest and most culturally sensitive cartoon ever made...but it was a product of its times.
The cartoon begins with a gorgeously Rotoscoped look at Hillybillytown...and the 3D look is quite nice. Soon Betty Boop drives to town with her traveling store...singing 'Comin' Round the Mountain to Bring You Hillbillies Up to Date'!! Next you see these dumb folk finding all sorts of unintended uses for her modern products and hilarity ensues.
If you can look past the nasty look at country folk, this is a cute and enjoyable cartoon. But in this politically correct age, I doubt if you'll be seeing this one unless you search for it on YouTube.