President Barack Obama delivers his first inaugural address:
Full transcript here.
If you have problems viewing this video, you can also watch the inaugural address at MSNBC.
And for high-def fans: thanks to Kossack barath, you can download a near-HD version of President Obama's Inaugural Address here. (If you're a real geek, it's a ~300MB recording of the speech at a 1280x720 resolution, but 30fps, not 60. The original recording was 1.8GB MPEG2; this is one-sixth that size in h.264.)