Watching music videos from the 1970s would give the viewer the impression that the music of the time was dominated by synthesizer pop and punk rock  But this would be a misleading impression
Because music videos were a new art form at the time, they attracted primarily cutting-edge musicians
Our notion of fashion trends will probably be accurate if we rely on TV fashion programs, despite the fact that these programs deliberately select the most outrageous outfits in order to get the viewers' attention.