A simple YouTube shortcode with several options & general improvement over the default one of WordPress.
The "Enhanced YouTube Shortcode" plugin provides a quick & easy way to use a custom YouTube© player in your posts and/or pages without having to get your hands dirty in the source codes! The main advantage over the way WordPress is working this out is the possibility of changing the display of all players in one single spot instead of having to do it manually at every places it has been set. But most importantly: it's fun and good for you! (check out the screenshot for a sample of all offered options!)
Now with more than 10 parameters available through a simple configuration page (reach it from the Settings Menu), the code that is generated always allows scripting access and forces the use of the ActionScript 3 engine (see Other Notes for limitations). It has been initially created (& tested) on a WordPress 3.3.1 live installation according to the specifications of the official YouTube Embed Player API Parameters.
There are a couple of things on the To Do list (see Other Notes) so you can expect updates soon!