1. A method comprising: providing a plurality of sequential frames of at least video information; determining a first corresponding significance metric for at least some of the plurality of sequential frames; identifying at least some of the plurality of sequential frames having a corresponding significance metric that has at least a predetermined relationship with respect to at least a first video significance threshold value to provide key frames; determining a cumulative significance value for at least some of the frames that fall between a given pair of the key frames by integrating over time a second corresponding significance metric for each such frame.