I saw this on TCM as part of a Treasures From the Archives anthology. It is basically a filming of the highlights from the Wizard of Oz stage play. Bebe Daniels became a big star in later years. She was the temperamental stage star in 42nd Street. However, she left Hollywood for England in 1935. Along with her husband Ben Lyons, she became very popular on British radio, especially in Life With the Lyons. I don't know if she ever met Judy Garland. It isn't impossible, but doesn't seem likely with the two of them on opposite sides of the Atlantic.