Methods, systems, and media for identifying and updating a group of media content items are provided. In some embodiments, the method comprises: receiving indications of filtering criteria; identifying a first collection of media content items, wherein the first collection of media content items includes media content items associated with a particular topic; identifying a first group of candidate media content items, wherein the first group of candidate media content items includes media content items not included in the first collection of media content items; creating a second collection of media content items by applying the stored filtering criteria to the first collection of media content items and the first group of candidate media content items; and causing a user interface that indicates the second collection of media content items and the identifier of the collection of media content items to be presented.