A fan made mix of the instrumentation from Ringo Starr's version of the song, coupled with John Lennon's vocals from his home demos.
Description by the uploader:
It has often been suggested that when the Beatles were preparing the Anthology, Yoko provided more than just "Free As A Bird" and "Real Love" for consideration for reunion songs. Two other titles have been mentioned, an unreleased but bootlegged demo called "Now And Then" and "Grow Old With Me", which had been issued on the posthumous "Milk And Honey" album. Neither were completed.
In October 2019, Ringo released his version of John's demo of "Grow Old With Me", which features on his album "What's My Name". This new version featured Ringo on drums and vocals and Paul on bass and backing vocals, with guitarist Joe Walsh joining them and new string arrangement by Jack Douglas (producer of John's "Double Fantasy" album).
This is an attempt at presenting a version of what a Beatles version of the track could have sounded like. This uses the backing track from Ringo's version and John's vocal and piano from two alternate demos that have not been released officially. As Ringo's version was recorded in the Bb and John's original was in G, it was not possible to incorporate Ringo or Paul's vocals (there was no magic "Strawberry Fields Forever" blend possible, the vocals were just way too slow!).