16. A computer system comprising: one or more computer processors; and a non-transitory computer-readable storage medium containing computer program code which when executed by the one or more computer processors causes the one or more computer processors to perform operations comprising: identifying a plurality of comments associated with a media content item; generating, for each of the plurality of comments, a sentiment score indicating a likelihood that the comment expresses a type of sentiment; adjusting the sentiment score generated for a comment from the plurality of comments based on information associated with a user that provided the comment from the plurality of comments, the information describing sentiment expressed by the user in additional comments for additional media content items; determining an aggregate score for the media content item based on the sentiment scores for the plurality of comments; receiving, from a device, a search query searching for media content associated with the type of sentiment; responsive to receiving the search query, identifying the media content item based on the aggregate score indicating that comments associated with the media content item express the type of sentiment; and providing search results to the device including the media content item.
16. A computer system comprising: one or more computer processors; and a non-transitory computer-readable storage medium containing computer program code which when executed by the one or more computer processors causes the one or more computer processors to perform operations comprising: identifying a plurality of comments associated with a media content item; generating, for each of the plurality of comments, a sentiment score indicating a likelihood that the comment expresses a type of sentiment; adjusting the sentiment score generated for a comment from the plurality of comments based on information associated with a user that provided the comment from the plurality of comments, the information describing sentiment expressed by the user in additional comments for additional media content items; determining an aggregate score for the media content item based on the sentiment scores for the plurality of comments; receiving, from a device, a search query searching for media content associated with the type of sentiment; responsive to receiving the search query, identifying the media content item based on the aggregate score indicating that comments associated with the media content item express the type of sentiment; and providing search results to the device including the media content item. 18. The computer system of claim 16 , wherein adjusting the sentiment score comprises: responsive to the information associated with the user indicating a low frequency of the type of sentiment in the additional comments, increasing the sentiment score generated for the comment from the plurality of comments.