That is actually a great idea, some people will actually start to make content about this game, luckily new people will play this game, slowly making a snowball for the community, raising it, even if at the start is hard,
You could also post a kind of Codes on the youtube videos of the SM official channel, activating the code on the game would give a "Event mission", with special prizes for completing them on a short time.
These missions will make more players look at the videos and play the game for the rewards.