Techniques are provided for associating comments with certain positions within a video (or audio) timeline. Multiple users compose comments, such as questions, and cause those comments to be stored in association with the video. Each comment is stored in association with a specific point or section in the video timeline. Later, another user can view the comments and select a particular comment, which causes the video to be played at the position in the timeline associated with the particular comment. Additionally or alternatively, playing a particular portion of a video may cause one or more comments that are associated with the particular portion to be displayed.