The most moving part of Concert for George was when Paul came out to sing “Something,” accompanying himself on ukulele. (George loved the uke, and was a member of a George Formby society.) It was so moving that, a year or so later, I misremembered the scene, and thought Paul had performed “While My Guitar Gently Weeps,” fitting in a sly joke on his choice of instrumentation.
Maybe my misremembering was a wish. Not long thereafter I saw uke maestro Jake Shimabukuro play an astonishing version of “WMGGW,” on this widely circulated video.
Postscript: Uke-Beatles fans, make sure you learn all the songs on this wonderful site.