My argument is that it's just as probable that the media is feeding into a desire that a large portion of the population holds. The line to see QEII's coffin was 5 miles long, with a wait time of 13 hours. Clearly some people really were interested in the queen.
My point is that I see the attitude professed by the author of that video a lot "Why would anyone be interested in the monarchy? It's just stupid propaganda, I should be about as interested in them in the Kardashians." There is always a subtext of that opinion along the lines of "If you're interested in the monarchy, you're just a stupid sheeple." And the weird thing for me is that, while I kinda agree with that assessment, I think I would be the stupid one if I were so clearly dismissive of an institution that is held in such regard by a huge portion of the populace.