A system and method for generating enhanced closed captioning commands are described. A video having multiple frames is received in a content building environment. Along with the video, user input defining an appearance and a location of text to be displayed is received. The appearance and the location of text correspond to one or more of the frames of the video. The appearance and the location of text are synchronized with each of the frames of the video. A design packet is generated based on the received user input. A delivery packet is generated that includes the design packet, the video, a video timecode, a text timecode, and enhanced closed captioning commands. The delivery packet is provided to a user device for playback.