1. A method, comprising: receiving a search query that includes a group of query fingerprints associated with sequential frames of video content presented at a client device; accessing an index of reference fingerprints that are associated with sequential frames of known video content; comparing the group of query fingerprints to reference fingerprints of the index; determining that the group of query fingerprints match the reference fingerprints of the index; and identifying the video content presented at the client device based on the determined match.