Disclosed are web-based systems and methods for editing digital videos. A graphical editing interface allows designating one or more videos to assemble into a video compilation. The graphical editing interface further allows specifying the portion of a constituent video of the video compilation that will be displayed when the video compilation is played. The graphical editing interface additionally allows the association of annotations—specifying, for example, slides, people, and highlights—with portions of the video. The associated annotations alter the appearance of the video compilation when it is played, such as by displaying slides, or text associated with the annotations, along with the video at times associated with the annotations. The associated annotations also enhance the interactivity of the video compilation, such as by allowing playback to begin at points of interest, such as portions of the video for which there is an associated annotation. The associated annotations can be created by selection of annotation tools of the graphical editing interface, where at least one of the annotation tools is created responsive to a user providing information associated with the tool.