Here's a link to a dailykos diary that has YouTube videos of six great speeches given by Senator Barack Obama:

http://www.dailykos.com/storyonly/2008/1/25/22592/2166/76/443354
The Obama Six
by JustAngry
Fri Jan 25, 2008 at 08:07:14 PM PST


The 6 speeches are:

DNC 2004

2002 Anti-War Speech

Jefferson Jackson Dinner

Iowa Victory Speech: This Moment

New Hampshire: Yes We Can

and

Obama at MLK Jr's Church