Pierre,
Also, image storage services that provide embed code that doesn't require a script should work in Cascade as well; so Giphy works, but Imgur does not (it requires JavaScript).
Some services provide additional HTML tags in their embed code. Currently you have to manually remove any additional tags from the embed code to leave just the <iframe>. We'll look to improve that experience in a future release, but for now here's an example of what to do:
For example, this is the embed code Giphy provides:
<iframe src="//giphy.com/embed/9WqOLBW3KIBOM" width="480" height="370" frameBorder="0" class="giphy-embed" allowFullScreen></iframe><p><a href="http://giphy.com/gifs/9WqOLBW3KIBOM">via GIPHY</a></p>
To get this to work in Cascade you'd just insert this:
<iframe src="//giphy.com/embed/9WqOLBW3KIBOM" width="480" height="370" frameBorder="0" class="giphy-embed" allowFullScreen></iframe>
Owen
Owen Evans
Lead Product Engineer | StoryMaps