In reply to Alan James - UKC: According to the blog he went back to make the video after he made the ascent.
Quote from the interview posted by Björn Pohl:
"A while back, Iker Pou made the 2nd ascent of Chris Sharma's Demencia senil, 9a+, at Margalef. I decided it was time to ask the man a few questions. Big thanks to Iker of course, but also to Cedric Larcher, from Kairn, who has translated the interview to and from Spanish.
I know he's gone back to make a video, so hopefully we'll see it soon."