Big Think has posted a video interviewwith Gary Giddins. The clip is actually mostly Giddins on criticism, which is always worth hearing. I remember seeing a panel years ago, on which Giddins professed bafflement at the idea that jazz critics would not also be students of criticism -- and yet, he said, that often turns out to be the case. This interview hits on a similar idea (around 11:30 and, more pointedly, at 25:00), along with much else.
Giddins has a big new book out, coauthored with Scott DeVeaux.