There are a few steps to manage background videos on your website.
To add video:
1. Choose the Section where you want to add image ann press Add video
2. Choose one of the option:
to use one of previously uploaded video click on Videos
to upload your new video click on Upload
to add videos from YouTube, Vimeo, Facebook, etc. to your website click on Youtibe, Vimeo, Links.
Note: Supported formats: mp4, webm, ogv, mp3, HLS(m3u8), DASH (mpb)
To remove video press on Remove video button on the right panel.