Background images/colors/videos are set on the Page style tab. The Page styles tab is on the right toolbar on the page builder and the background color/image/video is set on the backgrounds section:

The 'Select Background' button will allow you to display an image while the background video is loading.
Was this article helpful?
That’s Great!
Thank you for your feedback
Sorry! We couldn't be helpful
Thank you for your feedback
Feedback sent
We appreciate your effort and will try to fix the article