Due to its nonlinear potential, hyper video offers improvement in users' browsing efficiency and visual information's representation ability compared with that of traditional video. Based on the advantages of sketch and sketch based interface, this paper provides an intuitive sketch based interface for supporting hyper video creation to describe users' intention and improve user experiences. Furthermore, a force-directed graph layout algorithm for representing video semantics is discussed. This algorithm constructs a model for video semantics. It brings attributions such as temporal or spatial information, video structure and constraints between video clips into mass of nodes and attractive forces or repulsive force of edges in the force-directed graph. Result shows that it is an intuitive method to represent the dynamitic process of creation and modification for hyper videos.