function disable_embeds_code_init() {
  // Remove the REST API endpoint.
  remove_action( 'rest_api_init', 'wp_oembed_register_route' );

  // Turn off oEmbed auto discovery.
  add_filter( 'embed_oembed_discover', '__return_false' );

  // Don't filter oEmbed results.
  remove_filter( 'oembed_dataparse', 'wp_filter_oembed_result', 10 );

  // Remove oEmbed discovery links.
  remove_action( 'wp_head', 'wp_oembed_add_discovery_links' );

  // Remove oEmbed-specific JavaScript from the front-end and back-end.
  remove_action( 'wp_head', 'wp_oembed_add_host_js' );

  add_filter( 'tiny_mce_plugins', 'disable_embeds_tiny_mce_plugin' );

  // Remove all embeds rewrite rules.
  add_filter( 'rewrite_rules_array', 'disable_embeds_rewrites' );

  // Remove filter of the oEmbed result before any HTTP requests are made.
  remove_filter( 'pre_oembed_result', 'wp_filter_pre_oembed_result', 10 );
}

add_action( 'init', 'disable_embeds_code_init', 9999 );

function disable_embeds_tiny_mce_plugin($plugins) {
  return array_diff( $plugins, array('wpembed') );
}

function disable_embeds_rewrites ($rules) {

foreach($rules as $rule => $rewrite) {
  
  if(false !== strpos($rewrite, 'embed=true')) {
    unset($rules[$rule]);
  }
  
}

return $rules;
}