Short answers, pulled from the story.
John Lennon recorded a five-minute piano demo of Now and Then around 1977 at his home in the Dakota building in New York City. The tape captured a ballad with nearly complete verses though some lines remained unfinished on that original recording.
Paul McCartney stated the group did not proceed because George Harrison disliked the low quality and the song itself. Harrison called the demo recording fucking rubbish due to technical defects like a loud 60-Hz mains hum drowning out vocals.
Peter Jackson's production company WingNut Films isolated instruments and vocals using machine-assisted learning technology over a four-year period during the Get Back documentary. The neural network named MAL separated Lennon's voice from his solo piano demo which finally allowed the song to be finished.
Peter Jackson directed a music video premiering on the 3rd of November 2023 featuring footage of the band including newly found film from 1962 supplied by Pete Best. Wētā FX juxtaposed archival clips from the 1995 Anthology sessions with recent footage of McCartney and Starr performing backing vocals and instruments.
Now and Then debuted on the UK Singles Chart on the 3rd of November 2023 before rising 41 positions to reach number one the following week. This marked the Beatles' only UK number one song in 54 years since their 1969 single The Ballad of John and Yoko setting a record for the longest gap between chart-toppers.