The page "Header Image" field populates the header background image.  If a header video is present this image will be the preview image while the video is loading and also serves as the fallback for mobile devices.

The page title will display across the header image as an overlay, while the (optional) page description will display beneath the title in smaller text.

Using the field "Header Video" will replace the background image with a background video. The video must be MP4/h.264 formatted video and should use the standard HD ratio of 16:9.

*NOTE - This is a looping/muted background video so the video should be kept short in size/length (under 30 seconds).

If the header image you're using doesn't offer sufficient contrast to allow the page title or elements to display effectively, you can use the "Darken Header Image" checkbox to slightly darken the background image.

If a rotator is assigned to a page the images will display as slides.  The title and caption or optional and will display as an overlay.   The button uses the Button Text field.