This is a clip from the Beatles' first movie, A Hard Day's Night. The song was composed and led by George Harrison, one of his obligatory single songs on Beatles LPs in the early years. The band's sound was so fresh, so immediate, and so compelling from day one. That can be heard here, I think. And the harmonies...amazing.
I love the lines, "If somebody tries to take my place / Let's pretend we just can't see his face."