Have you heard about Matt, the guy who filmed himself dancing with people all over the world? It's a good story, and if you haven't heard about it, you can find out more at his website, or just watch the video. (Note -- The website seems to be down)
Even if you've seen the video, here's an update to the story that I just found out about.
The original videos on YouTube were the usual, low-quality types. But when you go to the YouTube site, there's a link below the video that lets you watch them in high quality. The difference is astounding and shows what kind of quality is possible with online video.
Here's the original (low-res) version of the video:
And to see the high-quality video, use this link.
It appears that a lot of videos on the YouTube site are now available as high-quality versions...just look for the link at the bottom of the viewer. It's worth it.