A method of incorporating additional video objects into source video data to produce output video data. The method includes retrieving source video data and data defining a segment size used by a distributor, into which video data is divided when transmitted. The method includes analyzing the source video data to identify selected frames of video material which include insertion zones which correspond to regions which are suitable for receiving an additional video object. The method includes identifying a boundary point of the source video data. The method includes embedding additional video objects into the selected frames, creating output video data which has a boundary which corresponds with the identified boundary point. The method includes generating metadata including information on said boundary point of the source video data to be replaced by the created output video data; and transmitting the output video data and the metadata to the distributor.