Slideshows will automatically loop or repeat until you touch the screen or a button on a remote. If your slideshow is not looping indefinitely, please contact me as this would be an issue.
If you want to repeat a video in a slideshow, it is most efficient to select the loop button to the left of the play button in the video player. Selecting this button will enable it and toggle between the repeat options.
Photo slideshows will repeat indefinitely across all photos in the slideshow.