Using the Parrot theme.
When using your editor, if I place a custom CSS on the page and choose "write custom code" (not enter 3rd party code), when I enter into the HTML section the youtube video HTML:
<iframe width="1280" height="720" src="https://www.youtube.com/embed/oOlu9JAU364?rel=0" frameborder="0" allowfullscreen></iframe>
an exclamation mark in a red triangle appears, and if I click save, there is no message, but the HTML is not saved.
Any idea what is wrong with the HTML above?
I'm using the PARROT theme.
I'm trying to add a Youtube video which will be reactive and won't have the adverts at the end, or the youtube video playback options on it.
I got the code from youtube, and managed to get it to work in the "embed 3rd party code" section of custom CSS, but I'm unable to modify the CSS except globally if I use that option.