Simply add the URL of your video to a YouTube or Vimeo slide and MetaSlider will add it to your slideshow. Either create a slideshow full of you favourite videos or mix it in between slides of other types to get just the result that you want.
If you select the FlexSlider option with video slides you can take advantage of MetaSliders play/pause functionality. This means that you can have your slideshow auto play but will pause when you set a video to play and carry on once the video has finished. You could even have the slider auto play and a video that auto plays to give you a smooth, completely automatic presentation!