I hate the TSA as much as the next guy (as long as the next guy is named Spiff), but the original blog post is dated 31 May 2010. Unless someone flagged the tapes for special review, it's highly unlikely that the TSA, or any other public/private entity, still has footage from that far back to review.

24/7 streaming video from dozens of cameras takes up a lot of space. An archival period of more than 72 hours would surprise me, and more than a week would be outlandish.

Of course, a very short archival period (24-48 hours) would ensure that the TSA has footage if a plane goes down, but neatly escapes any potential embarrassment, as any customer complaint is likely to take longer than that to generate public outcry.