How to Manage and Edit Plugins in WordPress - Brief Explanations of Plugins Feature in WordPress
http://www.syamsulalam.com/newbie-sec...
For you who want to know more about wordpress technical details and being rather expert on it, I suggest you to go to link above.
Anyway, this short video will show you how to manage plugins, search, upload, activate, and lots more stuff about plugins.
Hope this help, folks!