You can make annotations in the text accompanying a video transcript just as you would in a text-only transcript. Simply click and drag your mouse over the text you want annotated, then right-click on the highlighted text and select Annotate in TextMap.
Once an annotation is applied to the transcript and video, you can quickly navigate to the location by right-clicking on the annotation in the Annotations pane or in the transcript text and then clicking Video and Play Video Snippet.
For more information on annotating, see Creating annotations.