Installation & Configuration All you have to do is enable the extension from the extensions page. You will see a new settings link on the sidepanel. Select the video sources or mp3 that u want allowed on the forum.
Usage *Does not work under preview, you have to submit your comment for it to work* If ExtendedTextFormatter is installed. just use a youtube link like http://www.youtube.com/watch?v=i1q_8QQO70Q and submit the comment.
If you do not have ExtendedTextFormatter installed then you have to write a small html link like <a href="http://www.youtube.com/watch?v=i1q_8QQO70Q">Conan's Emmy Entry Hilarious!!!'</a> The extension will do the rest, and turn that link into an embed code so it plays right inside the comment.
You can embed, Youtube, Google Video, Myspace Video, iFilm and mp3 audio files
Compatability Should work with any WYSIWYG. haven't tested but no reason why it should not work. the magic occurs after the comment is posted. So use anything to put a valid link and it should work Should work with BBcode, Markdown and Textile as well