In reply to Denni:
Its a nice video and the lad did indeed seem to be climbing without using the fixed ropes. I wonder though if he clipped into them for the descent, which would be absolutely justifiable, wise and cautious, but would make "solo" a rather misleading description?
Also not sure if "youngest solo" is a category of achievement which it is wise to give overly much prominence to but agree that 21 isn't an age which has much relevance in this respect.