1. A content editor, comprising: a video compression encoder that generates first and second feature data from a video sequence as part of a compression process resulting in a compressed version of video data; said first and second feature data being separate from said compressed version of video data; an analysis engine programmed to receive said first and second feature data and calculate at least a third feature datum from at least one of said first and second feature data; a playback selector programmed to edit said compressed version of video data responsively to said at least a third feature datum.