The first step in adding a video is clicking on the "Video" button:
You will then be presented with a few simple options: URL, Auto Play, & Progress bar.
URL: You can paste the URL of any YouTube, Vimeo or Wistia video into the form field.
Progress bar: With YouTube videos, you have the option to hide or show the bar at the bottom of the video. Removing it can add to the visual appeal of your video and keep watchers more focused.
Auto Play: If you check this option, the video will play automatically when the page is accessed, but it will be muted by default. The page visitor can un-mute it manually if they wish to do so.
If your video is not hosted on YouTube, Vimeo, or Wistia, you can still add it to your page using the HTML element feature.