How do I create my own movie on Google Photos?

• Tap a thumbnail to select it.
• Tap a date to select all the media files under it.
• Press and hold a thumbnail as your first selection, and then drag your finger to the last item you want to select.

Photos and videos stored on the phone storage will need to be uploaded to your Google Account first before you can use it for your movie. You may need to wait until Google Photos is done loading your content.