This is a screenshot of the D3 interactive streamgraph of Vialogues 6973, a long (>20 min) video named “anthro of YouTube” with 116 total comments. Please feel free to play with the interactive version of prototype here.
It is a visual illustration of concept flows of a discussion for its corresponding video, as it shows the change and switch of discussion concepts along with the video time stream. Only because of Vialogues timestamp function, we are able to trace the discussion back to that particular portion of the video.
Each categorical color shows one keyword, so that the stream of this color is the stream of this concept. For instance, red represents YouTube in this example, we know that at the beginning and the 3/4s of the video, this concept appears more than the very end of the video.