Media company Viacom Inc., which owns the cable networks MTV, VH1, Nickelodeon and the Paramount Pictures movie studio, asked YouTube on Friday to remove more than 100,000 unauthorized clips from its hugely popular video-sharing site.

Viacom said in a statement that after several months of talks with YouTube and its corporate parent, the online search leader Google Inc., “it has become clear that YouTube is unwilling to come to a fair market agreement that would make Viacom content available to YouTube users.”