None, this plugin can be activated as-is on any forum.
If this plugin is enabled, you can use the [youtube]VIDEO_ID[/youtube] tag to embed videos into forum posts. Example:
This plugin uses FUDforum's BBCODE2HTML and HTML2BBCODE hooks.
Sorry! This site is experiencing technical difficulties.
Try waiting a few minutes and reloading.
(Can't contact the database server: Cannot return last error, no db connection)