Index: src/wp-includes/class-oembed.php
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- src/wp-includes/class-oembed.php	(revision 44691)
+++ src/wp-includes/class-oembed.php	(date 1548200490000)
@@ -114,6 +114,7 @@
 			'#https?://www\.someecards\.com/.+-cards/.+#i' => array( 'https://www.someecards.com/v2/oembed/', true ),
 			'#https?://www\.someecards\.com/usercards/viewcard/.+#i' => array( 'https://www.someecards.com/v2/oembed/', true ),
 			'#https?://some\.ly\/.+#i'                     => array( 'https://www.someecards.com/v2/oembed/', true ),
+			'#https?://((clips|www)\.)?twitch\.tv/.+#i' => array( 'https://api.twitch.tv/v4/oembed', true ),
 		);
 
 		if ( ! empty( self::$early_providers['add'] ) ) {