1. A device for automatic video summarization, the method comprising: a storage device to hold a video; a semantic classifier to generate a semantic model of the video from frames of the video; a relevancy classifier to assign respective relevancy scores to the frames; a multiplexer to: initialize the semantic model with the respective relevancy scores; and process, iteratively, the semantic model to produce a set of sub-scenes, each iteration comprising the multiplexer to: converge the semantic model following initialization; select a sequence of frames with a highest relevancy score after converging; and re-initialize the semantic model by fixing the relevancy scores for the selected sequence of frames.