George Harrison

McCartney has been busy in quarantine. The artist speaks about his new album, McCartney III, the quirks of writing love songs and remembering his late friends John Lennon and George Harrison.

The never-before-seen clip, of the two former Beatles recording Lennon's "How Do You Sleep?" in 1971, comes ahead of the Oct. 5 release of a 6-CD box set, Imagine - The Ultimate Collection.