YouTube added a new feature "you can now click on the "transcript" button to expand the entire listing. If you click on a line, YouTube will show excerpt from the video corresponding to the text. If you use your browser's find feature, you can even search inside the video. YouTube lets you upload a transcript file for a video and it can automatically generate appropriate timestamps. "YouTube uses experimental speech recognition technology to provide automatic timing for your English transcript. Automatic timing creates a caption file that you can download." Here's an example of video that includes a transcript."