Embedding YouTube videos in WordPress MU

After working with WordPress Mu, I found that I was unable to embed YouTube videos into a post. Instead, WordPress MU would strip my content out without any warning. After surfing around, I found the solution here:

Fix for including YouTube videos in posts in WordPress MU

To make the fix, open wp-includes/kses.php.

Look for:

if (!CUSTOM_TAGS) {
$allowedposttags = array (

and Add:

'embed' => array (
'style' => array (),
'type' => array (),
'id' => array (),
'height' => array (),
'width' => array (),
'src' => array ()),
'object' => array (
'height' => array (),
'width' => array ()),
'param' => array (
'name' => array (),
'value' => array ()),

to allow embedding of videos.

You can do the same for other HTML codes like

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