Hi Themeco Team,
I wanted to share a quick workflow improvement regarding Gutenberg video embeds (like YouTube) when used in combination with Cornerstone templates.
The Setup & The Issue: I use Cornerstone to build the Single Post Template, but the actual post content is written using the default Gutenberg editor. When adding a YouTube block in Gutenberg, WordPress falls back to a hardcoded width="500" and height="281" in the iframe HTML.
The Solution: Pro currently does not declare add_theme_support('responsive-embeds') . This single line is required for WordPress to output the .wp-has-aspect-ratio wrapper and the necessary CSS to make Gutenberg videos responsive and override the hardcoded 500px width.
I fixed this in my child theme with just this snippet:
add_action( 'after_setup_theme', function() {
add_theme_support( 'responsive-embeds' );
}, 100 );
Why this matters: Since many users rely on Gutenberg for content creation while using Cornerstone for the outer layout, adding this support to the core of Pro would vastly improve the out-of-the-box experience. It prevents Gutenberg videos from being stuck at 500px and ensures they scale beautifully on all devices without any extra CSS.
Regnalf