I've gone through several threads on this forum trying to get this to work and despite having what appears to be a valid configuration, Iframes still do not work whether pasted in via code or added via the media button.
Text filters in global config are set to no filtering for super users
The default profile is the only enabled one and is in position #1
Media support is enabled under Features & Layout
iframe is not in extended elements or prohibited elements
Allow iframes is set to "Yes" in Plugin Parameters > Media Support
I can get the iframe in if I paste it in code view and click save. But toggling between code view and editor removes the iframe. Using the media button to try and add an iframe, it simply isn't added when you click insert.
Please let me know what else I should be doing.