1. A method comprising: obtaining, by a digital content summarization system server and for a first media content item having associated descriptive information, a plurality of second media content items as auxiliary data, the obtaining using the descriptive information associated with the first media content item, the first media content item comprising a plurality of units; generating, by the digital content summarization system server, a media content item feature space comprising a first number of feature vectors comprising feature descriptor values representing the first media content item, the generating further comprising generating an auxiliary data feature space comprising a second number of feature vectors comprising feature descriptor values representing the plurality of second media content items as the auxiliary data, obtained using the descriptive information; identifying, by the digital content summarization system server, a plurality of segments of the first media content item, each segment comprising at least one unit of the first media content item's plurality of units; scoring, by the digital content summarization system server, each segment of the plurality of segments of the first media content item, scoring a segment of the plurality of segments comprising determining a distance between the auxiliary data feature space and at least one feature vector of the first number of feature vectors, the at least one feature vector representing the segment, each segment's score representing a measure of similarity of the segment to the descriptive information represented by the auxiliary data feature space; identifying, by the digital content summarization system server, at least one segment of the plurality of segments of the first media content item as more similar to the descriptive information, based on its determined distance to the auxiliary data feature space representing the descriptive information, relative to others of the plurality of segments using the scoring of the plurality of segments; and generating, by the digital content summarization system server, a summary of the first media content item, the summary comprising the at least one segment, of the plurality of segments of the first media content item, identified as being more similar to the descriptive information.