To use Video Background on homepage, follow with steps below:
Step 1: On Top Sidebar, click Edit with Elementor
Step 2: On the Elemetor Editor, right click on slide section
Step 3: On Left Sidebar Edit Section, Select Style tab and enter your video link. YouTube/Vimeo link, or link to video file (mp4 is recommended).
If you want to create a slideshow, you can select Background Type is SlideShow.
Step 4: Click Update button and finish.