Wearing white T-shirts with red stop signs and chanting “BET does not reflect me, MTV does not reflect me,” protesters have been gathering every Saturday outside the homes of Viacom executives in Washington and New York City. The orderly, mostly black crowds are protesting music videos that they say degrade women, and black and Latino men.

Among other things the protesters want media companies like Viacom to develop “universal creative standards” for video and music, including prohibitions on some language and images. Video vixens and foul-mouthed pimps and thugs are now so widespread, the protesters maintain, that they infect perceptions of ordinary nonwhite people.

“A lot of rap isn’t rap anymore, it’s just people selling their souls,” Marc Newman, a 28-year-old car salesman from New Rochelle, N.Y., said on Saturday. He was among about 20 men, women and children from area Baptist churches marching outside the Upper East Side residence of Philippe Dauman, the president and chief executive of Viacom Inc.

The protests, by a group called Enough Is Enough, began in mid-September outside the Northwest Washington home of Debra L. Lee, chairman and chief executive of BET, a unit of Viacom. (Viacom also owns MTV, VH1, Comedy Central and Nickelodeon.) On Oct. 20 protests also began outside Mr. Dauman’s home. The rallies in Washington have sometimes attracted hundreds of people, many belonging to the church of the Enough organizer, the Rev. Delman L. Coates, as well E. Faye Williams, as the chairwoman of the National Congress of Black Women and members of other civil rights and advocacy groups. The three rallies in New York have been much smaller.