I'm not sure how to "get it" without the video. Are we just "getting" that the song has geek associations? I seem to remember the song coming at the end of one or another old dystopian SF/F flicks, but don't remember the particulars. Strikes me as the sort of thing you'd have to either have seen recently, have seen frequently, or have a special connection to. I do register incidental music (particularly songs with lyrics, which are usually chosen for special effect, but also the parts that I can tell are intended to indicate or recall something), but I don't *usually* remember it for years afterward.

However, it would be strange if people didn't register background music on a home video and wonder why it was chosen. It's possible people have more than one association for the song, though.