Iframes not working

First off brave move for creating a plugin for something so new in the game (AMP).

Overall so far it well and looks great. Had a few issues upfront, but they were my own fault using invalid amp css selectors. Maybe on the Advanced css tab you guys could have a link for users

iframes aren’t working with the [embed] shortcode and the urls are getting stripped. I’m not sure if this is something wrong with my site or an issue with the plugin currently

Here’s an example:
https://theforestscout.com/amp/black-history-month-artists-behind-movement/

Here’s the errors
https://validator.ampproject.org/#url=http%3A%2F%2Ftheforestscout.com%2Famp%2Fblack-history-month-artists-behind-movement%2F

I tried both the shortcode like [embed]https://www.youtube.com/watch?v=ghhaREDM3X8[/embed] and just a standard iframe but neither seem to work.

The only thing I can think of off the top of my head without looking into how the plugin works is that it’s too close to the top viewport.

Anyway, keep up the good work guys.