Captions for Video with Flash CS3 (Part Two)
http://www.digital-web.com/articles/captions_flash_video_2/

Green, Tom
Digital Web Magazine
2007

Abstract:

In this article, we’re going to look at a method of captioning a Flash video file: embedding the XML directly into the FLV file. In very simple terms, the XML document will contain the cue points for the captions. When one of those cue points is reached, the caption appears over the video.