Sir Paul McCartney is facing controversy for showing a clip of Johnny Depp during his history making Glastonbury set. The former Beatle, 80, showed the actor, 59, using sign language on a giant screen behind him as McCartney sung the track ‘My Valentine’ that went with the music video. Depp, fresh from wining his defamation trial victory against ex-wife Amber Heard, 36, appeared in the 2012 video alongside actress Natalie Portman. The clip featured Portman, 41, lip syncing to the music while Depp strummed an acoustic guitar, with the images also shown by the BBC in their coverage of the Worthy…