The Divi slider supports WebM and MP4 video file formats, giving you two good alternatives for using a self-hosted video as your section or slide background.  However, it’s recommended that you upload your video in both formats, as this will ensure maximum compatibility with a range of different devices, such as smartphones, tablets, and regular desktop computers. After uploading a video file in these formats to your WordPress website, a content delivery network, or somewhere else, you can create a new slide for your slider. After doing so, you can click on the upload a video button to select the file from the WordPress Media library. If you are hosting the video elsewhere, you can simply enter the URL of the video file instead.