Behind-the-scenes footage of The Beatles has been teased in a new trailer for a highly anticipated documentary series on the Fab Four.

Get Back, directed by Oscar winner Peter Jackson, has been created from almost 60 hours of previously unseen footage shot in January 1969, as well as more than 150 hours of unheard audio.

Most of the material had been locked away in a vault for more than 50 years, left untouched after The Beatles split up the following year.

The three-part documentary series, which will air on the Disney+ streaming service in November, follows John Lennon, Sir Paul McCartney, George Harrison and Sir Ringo Starr during a time when they were writing and rehearsing 14 new songs in preparation for the band’s first live show in more than two years.

The tracks were originally intended for release on an accompanying live album.

In the trailer, Sir Paul jokes: “It’s going to be such a comical thing like in 50 years’ time. They broke up because Yoko sat on an amp.”

Michael Lindsay-Hogg, the original 1969 documentary maker, also says later on in the trailer: “The documentary is just grinding to a halt”, but Lennon replies: “Grinding to a halt? I think it’s taking off!”

Get Back also features the Beatles’ final live performance as a group – their renowned rooftop concert in London’s Savile Row – for the first time in its entirety, before they split in 1970.

Jackson – best known for directing the Lord Of The Rings films, but who’s last project was another documentary, turning black and white First World War footage into colour in They Shall Not Grow Old – has spent three years reviewing and editing the footage.

He has previously said of the film: “In many respects, Michael Lindsay-Hogg’s remarkable footage captured multiple storylines. The story of friends and of individuals. It is the story of human frailties and of a divine partnership.

“It is a detailed account of the creative process, with the crafting of iconic songs under pressure, set amid the social climate of early 1969. But it’s not nostalgia – it’s raw, honest, and human. Over six hours, you’ll get to know The Beatles with an intimacy that you never thought possible.”

Sir Paul and Sir Ringo serve as producers on the documentary, along with Lennon and Harrison’s widows, Yoko Ono and Olivia Harrison.

The Beatles: Get Back will be released on Disney+ over three days on 25, 26 and 27 November.