This video is slander. What is the context of it, and when was it made? I don't believe he is truly condemning sedevacantism. Why hasn't he taken down the website then? He's quite a bold man, I would think it would be gone if he has "conceded".
There is no way to concede, when it is apparent to all of good heart that it is a valid position to take ...sedevacantism, that is.