diff --git a/media/player/youtube/classes/plugin.php b/media/player/youtube/classes/plugin.php
index 8cf80a1cdb6..dd1478981e5 100644
--- a/media/player/youtube/classes/plugin.php
+++ b/media/player/youtube/classes/plugin.php
@@ -159,7 +159,7 @@ OET;
         $shortlink = '((youtu|y2u)\.be/)';
 
         // Initial part of link.
-        $start = '~^https?://(www\.)?(' . $link . '|' . $shortlink . ')';
+        $start = '~^https?://((www|m)\.)?(' . $link . '|' . $shortlink . ')';
         // Middle bit: Video key value.
         $middle = '([a-z0-9\-_]+)';
         return $start . $middle . core_media_player_external::END_LINK_REGEX_PART;
diff --git a/media/player/youtube/tests/player_test.php b/media/player/youtube/tests/player_test.php
index ffaf52e67b9..5c9d851731f 100644
--- a/media/player/youtube/tests/player_test.php
+++ b/media/player/youtube/tests/player_test.php
@@ -70,6 +70,9 @@ class media_youtube_testcase extends advanced_testcase {
         $url = new moodle_url('http://www.youtube.com/v/vyrwMmsufJc');
         $t = $manager->embed_url($url);
         $this->assertContains('</iframe>', $t);
+        $url = new moodle_url('http://m.youtube.com/watch?v=vyrwMmsufJc');
+        $t = $manager->embed_url($url);
+        $this->assertContains('</iframe>', $t);
 
         // Format: youtube video within playlist.
         $url = new moodle_url('https://www.youtube.com/watch?v=dv2f_xfmbD8&index=4&list=PLxcO_MFWQBDcyn9xpbmx601YSDlDcTcr0');