Ah. DirectRT doesn't yet have a function to pause the video on the last frame like that. A couple work-around ideas... You could capture the last frame as an image in your editing software and then present that immediately upon the video finishing. You could take that opportunity to display the text and take the RT.

Another solution would be to divide the clip in two. Present the first 28 second clip. Then pop up the text wherever you want it, using a time value of 0ms. And then show the remaining 2 second clip. The two clips should be almost, if not perfectly, seamless and you'll get the RT starting at the onset of the text.