For anyone who wants to see big-screen terpsichorean art at its top, Dancing is definitive. M-G-M has not only dipped into its own generous collection, but borrowed judiciously from most of the other studios that were in brisk competition during the golden years of movie musicals.
For openers from the early days, there is a lot of Busby Berkeley, plus Ruby Keeler and Dick Powell, followed by the wonderful work of Fred Astaire and Ginger Rogers and on through an absolutely complete list of the greats.
Much is made of a Ray Bolger-Judy Garland dance number from The Wizard of Oz, omitted from the final cut of the original. It’s interesting to see, but also easy to see (contrary to the gushing narration) why it was left out: the technique is a bit tacky and hardly up to the quality of what was released.