To chatter about is not changing anything: it is a good individual option to "talk about" wrong when society, the "good people" and governments are deaf and totally refractory to the issues, and in that hopeless situation all you can hope for is to at least maintain the topic there, even if nobody takes it seriously,
the main difference about democracies and dictatorships is not so much about the absence or presence of liberties, but how they too often pursue the same ends through different means: dictatorships supress "talking about" altogether, democracies, promote all sorts of prattle until people who never knew better get even more confused and just as manipulable.
"Talking about" is never worth anything as long as the rest do not EFFECTIVELY follow it, not merely clap to it, and truth is not something depending on a lone soldier fighting for it, or a melodramatic stage like the one in the video: if society and those who "talk about" can do nothing more than that, hoping that, somehow, the light will be made on those ignorant of horrors... if people do not have the capacity to inquiry by themselves and understand by themselves before it gets to the own backyards, even if there is no "talking about" as part of the daily prattle through all the different means and media, you increase the ado to make a nothing about the most serious issues.
The more you merely "talk about", the farther you stray away from the main topic, so that in this case it is not about North Korean people suffering under a ruthless regime anymore (allowing it EVER actually was about that), but about Americans getting pissed by being told what they can or can not do by filthy commies.