Forward to the past? Or a useful way of making a point or two?

OK, I admit it: I just don't get it. I watched the original "Did you know?" and was awe-struck -- not by the video, but by the number of people who thought it was good. And now the latest version is doing the rounds, and I feel exactly the same way.

However, I've been thinking about how a video like this might be useful to the leader/manager/teacher of educational technology in a school. On reflection, I think the video could be useful, but only in particular circumstances. I haven't read any blogs which state what those circumstances are, so here is my attempt to do so.