Ticket #16996: 16996-3.diff

wp-includes/class-oembed.php

@@ -169 +169 @@
                 $provider = add_query_arg( 'maxheight', $args['height'], $provider );
                 $provider = add_query_arg( 'url', urlencode($url), $provider );
 
+                apply_filters( 'oembed_params_before_fetch', $provider, $args );
+
                 foreach( array( 'json', 'xml' ) as $format ) {
                         $result = $this->_fetch_with_format( $provider, $format );
                         if ( is_wp_error( $result ) && 'not-implemented' == $result->get_error_code() )