Improvements in the handling of user generated content (UGC) are helping rights holders grow income from YouTube and other licensed platforms. Google's ContentID system has made it easier for rights holders to differentiate between video types, allowing the streaming of non-official user-generated content such as mashups to be licensed and monetised, rather than removed for infringing copyright.YouTube's TrueView tool for advertising is also having a positive impact in monetising music videos. According to YouTube, revenues generated from UGC on its platform have now overtaken those generated by official videos.