From “Ain’t It Cool News” to “Variety,” the reviews have been rapturous for Rick McKay’s magical treasure hunt of a movie. He grew up in the 1960s in Indiana, so far from Broadway that he had to create it in his imagination. When McKay became a singer, writer and producer and finally saw live theater in New York, many had moved on. So he set out to find them with his camera and his unstoppable passion.p>hat’s the movie, and it’s one for the time capsule. McKay recorded more than 250 hours of interviews with legends too numerous to mention and added archival footage, from the voice of Marlon Brando onstage in A Streetcar Named Desire to John Raitt in Carousel. Don’t let anyone spoil the surprises of how McKay distills their memories into two hours of spun gold. At the end, the feisty Elaine Stritch scolds McKay, “For Christ’s sake, Rick, don’t you have enough?” Not nearly.