Abstract: A content replacement system sends a content item with one or more content replacement parts to be consumed by a user of a client device. The content item is further associated with an interaction pattern that corresponds to a particular user interaction and a defined action that is to be executed by the client device when the particular user interaction is performed on the client device. While the content replacement part is played on the client device, one or more sensors of the client device acquire data regarding user interactions performed by the user on the client device. The acquired data is processed to determine whether the user has performed a user interaction that matches the interaction pattern. Upon detecting a match, the client device sends a notification to the content replacement system indicating that the match has occurred and further executes the defined action.

Abstract: A content replacement system detects a start of a content replacement break in a content stream provided to a client device. The system selects one or more of a plurality of content replacement parts. The system computes a retargeting probability for each of the selected content replacement parts, the retargeting probability based on collected information stored in a profile database, the collected information including a number of times that requests for content replacement parts have been associated with a network address and device identifier of the client device. The system modifies a content score of each of the selected content replacement parts by the corresponding retargeting probability. The system ranks the selected content replacement parts based on the modified content scores, inserts one or more of the highest ranked selected content replacement parts into the content stream, and transmits the modified content stream to the client device.