How to disable YouTube (and any other oembed) embeding in the editor

Question

It is easy to disable oEmbed on the front end Disable automatic oEmbed of a youtube url within the content, but this leaves us with the editor shows a video (in the case of youtube) where on the front end there will be only a URL.

How can it be disabled on the editor side as well?

Answer 1

The quick way to disable oEmbeds would be

add_filter( 'pre_oembed_result', '__return_false' );

If you want to disable it for all external links then try:

/**
 * Disable oEmbeds for external links 
 */
add_filter( 'pre_oembed_result', function( $result, $url, $args )
{    
    if( parse_url( home_url(), PHP_URL_HOST ) !==  parse_url( $url, PHP_URL_HOST ) )
        $result = false;

    return $result;

}, 999, 3 );

This is a modification from a more detailed answer I posted here.