Nico Nico Douga.

app/Http/Controllers/BoardController.php

@@ -1695,6 +1695,7 @@ class BoardController extends Controller {
             '~\[miiverse](.*?)\[/miiverse]~s',
             '~\[smb](.*?)\[/smb]~s',
             '~\[video](.*?)\[/video]~s',
+            '~\[nico](.*?)\[/nico]~s',
         );
 
         $replace = array(
@@ -1725,6 +1726,7 @@ class BoardController extends Controller {
             '<span class="MiiverseSymbols">$1</span>',
             '<span class="MarioBros">$1</span>',
             '<video width="600" controls><source src="$1" type="video/mp4">Your browser does not support MP4, or HTML5 videos.</video>',
+            '<script type="application/javascript" src="https://embed.nicovideo.jp/watch/$1/script?w=640&h=360"></script><noscript><a href="http://www.nicovideo.jp/watch/$1">title</noscript>',
         );
 
         return preg_replace($find, $replace, $text);