Go to you AdminCP:
System ->
Look & Feel
Media: YouTube
Options:

Edit Media Tag...
Media Replacement HTML:
Replace all the code by:
<embed type="application/x-shockwave-flash" src="http://www.youtube.com/v/$2&webm=1&hl=en_US&feature=player_embedded&version=3" id="movie_player" allowscriptaccess="always" allowfullscreen="true" bgcolor="#000000" height="385" width="640"></object>
Before and After:
Final Result:
See on YouTube
Note: if you want to increase the height and width
Height search for:
height="385" and replace with
height="Value for Your Height"
Width search for:
width="640" and replace with
width="Value for Your Width"
Author: George (SOS Invision - gfdant~)
Źródło: http://www.codersrefuge.com/tutorials/article/91-new-media-bbcode-youtube/
sob, 30 październik 2010