We are also noticing that certain videos are not being detected by RealDownloader. Our engineering team is investigating it. We will send you an email as soon as it is resolved.
Music industry is behing the non downloading issues!!!
YouTube and the music industry have come to an agreement to stop us from downloading and making mp3s!!! That's why we can download education videos and etc., but not artist such as Madonna, Mariah, and other mainstream recording artists or copy righted material. Mark my words this wont be fixed anytime soon!!