Abstract: Systems, methods, and computer-readable media are disclosed for caching selected data for use in real-time content selection. In one embodiment, an example method may include determining a first set of user identifiers for users that are eligible to be presented with content associated with a first product identifier, the first set having a first number of user identifiers, determining a second set of user identifiers for users that are eligible to be presented with content associated with a second product identifier, the second set having a second number of user identifiers, and determining that the first number is greater than the second number. Example methods may include determining first content associated with the first product identifier, determining first product information associated with the first product identifier, and caching the first content and the first product information at a server instead of second content associated with the second product identifier.

Abstract: Tracking of a defined area over a series of video frames that compose a video is provided. Various rules regulate the identification of a reference area to be tracked and the determination of subsequent areas that correspond to the reference areas over a series of respective images included the series of video frames. Metadata indicative of placement of a subsequent area in a subsequent image can be updated and retained. A mask video that can permit avoiding or otherwise mitigating occlusion of foreground elements of the subsequent image also can be updated and retained. Such metadata and mask video can permit injecting customized content into the video for which the reference area is tracked.