People don't really know, they are demanding answer from youtube and FTC. Youtube is just saying that youtubers need to consult their own lawyers... like most of them have access to lawyer
At the moment people are thinking of putting age tags like 13+ in the title of video, putting disclaimers at the start of video, cursing, moving to more mature content like towards more violent and adult games and away from minecraft, trying to find sponsors so they could get by without ad revenue but the issue is that videos that are flagged as child content don't get any comments and they can't be searched in youtube so the audience will die for that kind of videos anyways.