Pop music originated in the 1950s in the US and UK, featuring happy tones, catchy hooks, and emphasis on recording and technology over live performance. Pop videos aim to appeal broadly rather than to subcultures. Rock music features amplified electric guitar and deeper, less filtered lyrics about sex, drugs, and rebellion. Rock videos convey heavier emotion through darker colors. Indie music began with Nirvana and other 1990s artists, with lower budget videos focusing on relatable male perspectives of love through casual representation.