This movie presumes to be set during an all-star concert on Broadway in New York (there actually was a big country music concert at Carnegie Hall around this time with several of the acts in the film including Skeeter Davis, Buck Owens, and George Jones) but it's low-budget belies the fact that this was shot on obviously less prestigious grounds.
Loaded with superstars of the era (George, Buck, Skeeter, Porter Wagoner, The Wilburn Brothers, Flatt & Scruggs, Bill Anderson, Roy Drusky) and veteran stars like Hank Snow and Wilma Lee & Stoney Cooper, the movie also features teen-aged Hank Williams Jr. in the first stages of his singing career. The movie also brings Hank Williams Sr. into the film via Hank Snow screening some film he has (actually it's a clip from the 1950's Kate Smith Show) for Hank Jr. Songs include "Something Precious", "A Satisfied Mind", "White Lightning", "Act Naturally", "Still", "Big Midnight Special", and "I'm Movin' On".
This film was released on videotape during the 1980's by a smaller video company. I discovered The Ernest Tubb Record Shop in Nashville sells it on DVD (see message board for information).