13. A system comprising: one or more processors; one or more storage media carrying instructions which, when executed by the one or more processors, cause: storing comment data that indicates a plurality of comments that are associated with a media item; wherein two comments in the plurality of comments are from different users of a plurality of users; wherein each comment in the plurality of comments is associated with a time within the media item; receiving first input that indicates a particular time; wherein the particular time is one of: a selection time indicating when a comment was first or last selected by a user, or a view time indicating when a comment was first or last viewed by a user in response to receiving the first input: performing a search of the plurality of comments based on the particular time, identifying, as a result of performing the search, one or more comments of the plurality of comments that are associated with the particular time; in response to identifying the one or more comments as the result of performing the search, causing, to be displayed on a screen of a computing device, the one or more comments of the plurality of comments; receiving second input that indications user selection of a first comment in the one or more comments; in response to receiving the second input: identifying a first time that is associated with the first comment, identifying, within the media item, a location that corresponds to the first time, causing a playback position of a media player to move to the location.
13. A system comprising: one or more processors; one or more storage media carrying instructions which, when executed by the one or more processors, cause: storing comment data that indicates a plurality of comments that are associated with a media item; wherein two comments in the plurality of comments are from different users of a plurality of users; wherein each comment in the plurality of comments is associated with a time within the media item; receiving first input that indicates a particular time; wherein the particular time is one of: a selection time indicating when a comment was first or last selected by a user, or a view time indicating when a comment was first or last viewed by a user in response to receiving the first input: performing a search of the plurality of comments based on the particular time, identifying, as a result of performing the search, one or more comments of the plurality of comments that are associated with the particular time; in response to identifying the one or more comments as the result of performing the search, causing, to be displayed on a screen of a computing device, the one or more comments of the plurality of comments; receiving second input that indications user selection of a first comment in the one or more comments; in response to receiving the second input: identifying a first time that is associated with the first comment, identifying, within the media item, a location that corresponds to the first time, causing a playback position of a media player to move to the location. 14. The system of claim 13 , wherein the instructions, when executed by the one or more processors, further cause, in response to receiving the second input, causing the media item to play beginning at the location.