The BBC did an hour on Friday 18th March, repeated on Sunday 20th, on "John Williams at the BBC", the master guitarist, with clips from some of his performances on screen. It is on I Player.
One not included was at the Last Night of the Proms in 2005, playing the Rodrigo, "Concierto de Aranjuez". A pity, it was very good.
This video of the performance is on Youtube at 22 minutes if it would be a treat. We were on the front row with a full view of the guitar by the camera as in the picture above.