Captions can add a lot of interest to videos. A certain number of captions are included with the packages, but no package includes unlimited, free captions. Generally, excluding the opening and closing titles, about 5% of photos in the Gold and Platinum packages can have captions. So, for example, for a video with 100 photos, 5 photos can have captions. In this example, any more than 5 photos with captions would be additional cost.
Captions are not the same as a text slide. A text slide is much longer than a caption. Poems, psalms and long Bible verses are generally longer, so they would be considered a text slide.