This demographic heavily favors the "Adult Standards" or "Nostalgia" radio format. It highlights Big Band, classic vocalists, and the pre-rock or early rock era.
Because "mature year 70 entertainment and media content" can refer to a few different concepts depending on the context, a breakdown of the three most likely interpretations of your request is provided below. 🧭 Interpretation 1: Media Rated "Mature" in the 1970s
Media from the 1970s pushing the "Mature" boundary featured the birth of New Hollywood. It was defined by gritty realism, psychological depth, and a sudden influx of graphic violence and frank sexuality that previously hadn't been allowed under the older Hays Code .