Steps to reproduce bug:
-Create an article
-Add a dailymotion video (https://www.dailymotion.com/video/xxxxxxxxxx)
-Save the article
-Open the page containing the article in the FO or preview/live

Bug:
The iframe uses http and not https:

<iframe allowfullscreen="allowfullscreen" frameborder="0" src="http://www.dailymotion.com/embed/video/xxxxxxxxx" height="360" width="480" class="" id="iframe_xxxxx"></iframe>

Consequence:
Mixed content error in the browser's console