4. The method of claim 3 , wherein identifying the topics comprises: (i) comparing the first text with the second text to produce a text similarity value; and (ii) performing step (i) for each video segment of the plurality of separate audio-video sources with every other video segment of the plurality of separate audio-video sources.
5. The method of claim 4 , wherein identifying the topics further comprises: (iii) setting the text similarity value corresponding to a video segment to a predetermined value; (iv) performing step (iii) until each text similarity value for every video segment has been set to the predetermined value.