To begin, go to the Photos tab of the specific project. If you have a pre-existing slideshow, click the pencil icon to edit it. If you’re creating a new slideshow, click + Add Slideshow.
Download Slideshow
In the Slideshow editor, click the Share button to open the Sharing window.
Click the Download button to generate a file of your slideshow. This may take up to an hour for the slideshow to render, so you will be emailed the link to download when your slideshow is ready.
Note: Slideshow video cannot be downloaded on an iPhone device using the Chrome browser.
The video can be added to the Dropbox account or Google Photos account, or downloaded directly to the iPhone device using Safari Browser.