Viewers may soon have to start paying to watch those cute cat videos on YouTube. The Google-owned video-sharing service is reportedly introducing a paid subscription service that could launch as early as this week.  The "Financial Times" says the service could involve as many as 50 YouTube specialty channels.  The plan reportedly calls for a one-dollar-and-99 cent monthly fee for some channels. The site has around one billion users that reportedly view an estimated six billion hours of videos every month.