Restore WhatsApp media from Google Photos backup

I set up my phone to automatically back up WhatsApp media to Google Photos. Now I want to print one of my conversations as a book using a service like Zapptales . The problem is, that all media, that has already been backed up, is no longer available: > Sorry, this media file doesn't exist on your SD card. However, the photos and videos are all still available on Google Photos. Is there a way to restore certain or all WhatsApp media from there back to my device?