All that changed when the band made Sgt. Pepper's Lonely Hearts Club Band. Find out why the creation of that album was so freeing, below.

Paul McCartney plays the opening song from the Beatles' first album on the Got Back Tour. Surprisingly, one of the Beatles ' most iconic songs is not often played by Paul McCartney on his Got Back Tour.

"When we came, it was quite shortly after Kennedy being assassinated," Paul McCartney says in the trailer, released Thursday. "Maybe America needed something like The Beatles to be lifted out of sorrow." McCartney and Ringo Starr are among the documentary's producers, while David Tedeschi serves as director.