Videos can be inserted if you have the HTML embedding code. Youtube or Vimeo for example provides these codes to their stream videos.
- Go to the article where you want your videos to appear and click the [toggle editor] link to switch it to HTML Code mode.
- Whereever you want the video to appear you can copy and paste the HTML video code there.
- Click the toggle link again to switch back to Full editor mode and review your work.
- Save the page when you are done.