The mediacaptain is a system that facilitates indexing, browsing, summarizing and retrieval of video on the Web with the support of supplementary material. The demo is available over the Web at http://www.mediacaptain.com. It is a presentation about the mediacaptain using the features of the mediacaptain. In order to experience all the possibilities of the mediacaptain, it is advisable to watch the video at the given URL and make use of the provided functionality. Keywords Streaming media, streaming video, buffering, supplementary text, supplementary graphics, video on the Web, video and text, user interface, demo.