Detecting Sensor-Based Interactions with Client Device in Conjunction with Presentation of Content

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.