Oh, nevermind; I just found the new videos. Yeah, they've disabled the comments, FtB style.
If I'm going to be cynical, it's about redirecting traffic to Freethought Blogs, trying to maximize their footprint while minimizing the effort of moderation.
However, it seems like they're just trying to place themselves beyond the obligation to respond to legitimate criticism. Part of the reason FtB collects so many trolls, apart from their questionable arguments and behavior, is that they appear incapable of handling them correctly.