A system provides personalized media in video for presentation using a video decoder in a device such as a video recorder, hardware or software player, computer system, or television. The personalized media may be embedded or hidden in a video stream or provided separately. A video decoder determines profile and preference information associated with a viewer, group, or demographic and personalizes commercial content using the profile and preference information. The system includes personalized media by introducing, embedding, overlaying, etc., media on video during commercial breaks. Personalized media may be provided during normal viewing or may be provided when a skip forward or fast forward request is received. The system may also evaluate personalization mechanisms using neuro-response measurements.