Determining user attention level during video presentation by monitoring user inputs at user premises

In one embodiment, a method comprises identifying, by an apparatus at a user premises, a presentation of an addressable video stream to a user; detecting by the apparatus whether the user has supplied a user input, relative to the presentation, to at least one user input device; the apparatus selectively associating each user input detected relative to the presentation with a corresponding identified position of the addressable video stream; and generating, by the apparatus, a data structure enabling identification of an attention level by the user toward at least a portion of the addressable video stream, the data structure specifying an identifier for the addressable video stream and specifying whether the user supplied any user input relative to the presentation, including selectively adding to the data structure at least one user input and the corresponding identified position.