Systems and methods are provided for selectively replacing commercials that are in a video data stream with alternative commercials. Automatic content recognition (ACR) is performed on the video data stream to detect the identity of each of the commercials played in a commercial block during a commercial break. Commercials in the video data stream which are detected as being displayed on a video display device are stored in a first database, and commercials in the video data stream which are detected as not being displayed on the video display device are stored in a second database. A rules engine defines how commercials in the video data stream should be replaced with other commercials. Commercials in the video data stream that were previously detected as being displayed on the video display device are selectively replaced with commercials that were previously detected as not being displayed on the video display device.
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