Warner Music, one of the first media companies to strike a licensing deal with YouTube, has demanded that the Google-owned site pull down all videos from its artists and songwriters, in a move affecting millions of pieces of professional and user-generated content.

”We are working actively to find a resolution with YouTube that would enable the return of our artists’ content to the site,” a Warner spokesman said: “Until then, we simply cannot accept terms that fail to appropriately and fairly compensate recording artists, songwriters, labels and publishers for the value they provide.”