1. A computer-implemented method for processing a video, comprising: storing the video and associated metadata in a multimedia database of a hosting website, wherein the metadata includes a plurality of tokens that are provided from a user who uploaded the video to the hosting website; determining, for each of the plurality of tokens, a concept associated with the token; determining a number of concepts related to content of the video and a number of distinct concepts unrelated to the content of the video from concepts determined from the plurality of tokens; and responsive to the number of distinct concepts unrelated to the content of the video exceeding a threshold, marking the video as spam.