A video downloading and scrubbing system for use with a web-based video editing system is provided. The downloading and scrubbing system includes: a scrubbing subsystem configured to: receive a user request for a portion of a video at a particular time index; create a data stream beginning containing video data relating to that time index in the video; and transmit the data; and a preview subsystem configured to provide a preview of video data to the user prior to the user completing the download of the video.