Embed image or video
In the visualization editor, click on Embed and select the type of embed you wish to create. You can embed an image, or any iframe html embed code, like a youtube video.
The embed is created and added to your visualization. To edit the embed, click the 'Edit' button that appears when you mouse over the embed.
When we go to edit the embed, we can paste a video embed code from youtube, and test that it loads.
For security, only iframe tags and a limited set of html attributes are allowed.