diff --git src/wp-includes/class-oembed.php src/wp-includes/class-oembed.php
index 8582fa8a7a..519cc352ed 100644
--- src/wp-includes/class-oembed.php
+++ src/wp-includes/class-oembed.php
@@ -64,7 +64,7 @@ class WP_oEmbed {
 			'#https?://wordpress\.tv/.*#i'                 => array( 'https://wordpress.tv/oembed/', true ),
 			'#https?://(.+\.)?polldaddy\.com/.*#i'         => array( 'https://api.crowdsignal.com/oembed', true ),
 			'#https?://poll\.fm/.*#i'                      => array( 'https://api.crowdsignal.com/oembed', true ),
-			'#https?://survey\.fm/.*#i'                    => array( 'https://api.crowdsignal.com/oembed', true ),
+			'#https?://(.+\.)?survey\.fm/.*#i'             => array( 'https://api.crowdsignal.com/oembed', true ),
 			'#https?://(www\.)?twitter\.com/\w{1,15}/status(es)?/.*#i' => array( 'https://publish.twitter.com/oembed', true ),
 			'#https?://(www\.)?twitter\.com/\w{1,15}$#i'   => array( 'https://publish.twitter.com/oembed', true ),
 			'#https?://(www\.)?twitter\.com/\w{1,15}/likes$#i' => array( 'https://publish.twitter.com/oembed', true ),