1. A method performed by at least one processing device, the method comprising: providing a search control associated with video content items, the search control for receiving search queries for identifying video content items in a repository of video content items where each video content item is associated with one or more channels in a video sharing environment; receiving a search query from an advertiser that is logged into one of the video sharing environment or a content distribution system; locating one or more matching video content items from the repository based on the search query; receiving a selection of one or more of the video content items for inclusion in an advertisement campaign associated with the advertiser; and responsive to receiving the selection of one or more of the video content items for inclusion in the advertisement campaign associated with the advertiser, determining, by the at least one processing device, a channel associated with the selected video content items; where providing the search control comprises: identifying a channel associated with one or more video content items that were selected by the advertiser for inclusion in a prior advertisement campaign, and populating a suggestion list with one or more filter criterion based on the identified channel.