Though there are many commercial video authoring tools available today, video authoring remains as a tedious and extremely time consuming task that often requires trained professional skills. To tackle this issue, this demonstration presents a novel end-to-end system, called LazyCut, which enables fast, flexible and personalized video authoring and sharing. LazyCut provides a semi-automatic video authoring and sharing system that significantly reduces users’ efforts in video editing while preserving sufficient flexibility and personalization. Categories and Subject Descriptors: H.5.1 [Information Interfaces and Presentation]: Multimedia Information Systems - video; I.2.10 [Artificial Intelligence]: Vision and Scene Understanding - video analysis. General Terms: Algorithms, Experimentation.