To use your wideo as a presentation, click "presentation mode" on the viewer. Once your wideo is in presentation mode, each scene will play as a slide. This way, you can show it as a slideshow presentation.
If you want to share your wideo as a slide presentation with others, open it in the editor, click "Preview Wideo", then "Presentation Mode" button and save it.
That is to say, your wideo will be shown in the mode (video or presentation) that was set before the last time it was saved inside the editor.