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You can add a freeze frame at the end of your movie that will continue to play for a certain period of time. (As long as you set it to be on your timeline.)
But it's impossible to have it freeze indefinitely on a single frame of video.
Thanks...Can you freeze indefinitely on a still at the end?
"Indefinitely?" No, but you can extend the Duration, as long as you wish, limited only by the resulting file size. How long do you think you want the Image on the screen?
How will you be playing, delivering the file? That might be a determining factor.