Having watched the two short videos I really don't see any obvious things they could have hidden there. The audio (which I presume is the important part) appears to keep on going, while a short segment of the video repeats. They also mention in the article that "The audio ends more than a minute before the video images do. "

So to me this just sounds like some small parts of the video got repeated by accident, leading to a slightly "extended" video that becomes out of sync with the audio.

But maybe I'm being too naive here, I don't actually know the backstory of this.