To add a video or image background to your scene :
Navigate to the right side tool bar toggle on the Background media option.
Choose from the selection of simple colour backgrounds, browse through the image library, or use the search bar to find an appropriate image.
Once selected, it will be automatically added as a background on the canvas.
To upload an image to the library, see the How do I upload an image to Synthesia? guide.
Notes:
Supported formats for video backgrounds are .mp4, .webm and the maximum size for a video upload is 250MB.
Supported formats for image backgrounds are .jpeg, .png,.svg and the maximum size for uploaded images is 300MB.
If you have a previously created video with Shutterstock content and moves the video to another workspace, you will no longer have access to the Shutterstock content.