A simple YouTube shortcode with several options & general improvement over the default one of WordPress.
For a manual installation, follow these quick steps:
Extract the /enhanced-youtube-shortcode/ folder from the downloaded file.
Upload this extracted folder & its content in your WordPress plugins directory.
Go to "Plugins => Enhanced YouTube Shortcode" to activate the plugin.
Go to "Settings => Enhanced YouTube" to tweak the player options.
Now use [youtube_video id="uAOLzRhKF9c"] kind of shortcode.