Abstract: There is provided a method of providing a receiver of a transmitted stream of video data for an ongoing succession of video frames with one or more images representing that stream of video data. Indicator data is created which identifies individual frames in the stream of video data for use as the one or more images. The indicator data is then transmitted to the receiver and used by the receiver to capture frames for use as representative images. The representative images may be used as part of an electronic program guide, for instance when the frames are captured from earlier transmitted trailers. Also, the representative images can be used when recording a received transmitted program, in particular in conjunction with indexing information for playback of the recorded program.