How to create a section with video background

Add new section:

Command bar > Add > "Add Page Section" > "Single Column Section"

Add video background to section

Open section properties
Choose "Background Video"
Select the video file we want to display in the background
Choose "Save"

Tip: Add a frame from the video as section background image. Background image is displayed while background video is loading.

Recommended properties for sections with video background:

Open section properties
Set Overall Section Width to 100%
Set Content Width to 100%
Set Top Padding to 0
Set Bottom Padding to 0

Test section background video in Preview