1. A method comprising: receiving category identifiers associated with a plurality of videos in a video channel, wherein the plurality of videos are associated with a plurality of categories specified by the category identifiers; receiving, from a plurality of user devices, ratings of each of the plurality of videos in the video channel, the ratings based on video use within the video channel; and generating one or more scores of the video channel in view of the category identifiers, watch time associated with the video channel, and the ratings, wherein each of the one or more scores are indicative of relevance of the video channel to a respective category specified by the category identifiers, wherein the watch time is from a first point in time a user accesses the video channel until a second point in time the user exits the video channel.