“Youtube ToolTip” is a simple plugin, which changes all your links of “youtube” on a fast preview for the convenience of your readers.
Modifying all the links and using “jQuery” shows an attractive & modern blog.
Also use “qTip”, qTip is a tooltip plugin for the jQuery framework. It’s cross-browser, customizable and packed full of features! 
qTip is licensed under the open source MIT license, which allows you to use the script for whatever you want, whenever you want, however you want, as long as you include a copy of the license!
For more information about this plugin visit http://javiergalicia.wordpress.com/2009/07/03/youtube-tooltip-to-wordpress/

Youtube ToolTip

"Youtube ToolTip" Click on any of your links to get a quick preview of the youtube video.

Hugh Lashbrooke

“Quick Empty Trash” is a small utility plugin that saves you time when emptying the trash for any post type. It adds an ’empty trash’ button to every post type’s list table, so that you can empty the trash for that post type without having to load the list of trashed posts first. This helps if you have a very slow-loading dashboard or if you just feel like saving yourself an extra page load in order to perform a simple action.
There are no settings to configure – just activate the plugin and the button will appear for you.

Quick Empty Trash

Adds an 'empty trash' button to all post type dashboard tables - saves you from needing to load the trash list before being able to empty it …

Youtube ToolTip vs Quick Empty Trash