1) The document discusses the difference between interactivity and participation in video music streams. Interactivity refers to direct manipulation of media through technology, while participation refers to social and cultural interactions around media. 2) Interactivity corresponds to the technological characteristics that enable user participation. Video streaming portals have become social networks, integrating interactive video music streams. 3) Examples are given of interactive video music streams that have enabled participatory fan cultures and virtual communities to emerge around collective intelligence and performance.