1. A method of using multimodal information for media tagging, comprising: capturing, during multimodal interactions of a plurality of users, multimodal information related to media, wherein the multimodal information comprises speech information and gesture information of the plurality of users; identifying an occurrence of a pre-determined keyword in the speech information; identifying a co-occurrence of a pre-determined gesture from the gesture information with the occurrence of the pre-determined keyword in the speech information; identifying a speech portion of interest in the speech information corresponding to the identified co-occurrence of the pre-determined gesture and the pre-determined keyword, wherein the speech portion of interest includes speech for a specified time duration before and after the occurrence of the identified keyword; and tagging the media by attaching the identified speech portion of interest to the media.