Hm, the 18-20 year olds I know know EVERYTHING from YouTube; they are really digital experts in past urban trends. I had a discussion (and subsequent alcohol excess where an old communist joined-in) on a customer event the other month with mid-20s customer supporters who described themselves as neo-punks (with lots of metal in the face) and were big in "dark" music and knew every single politically-incorrect dark metal band from the 90s. Also, it's not uncommon to enjoy a Jean Gabin or Film Noir movie, say, for the ones I know.