AN EXCELLENT video you can use to help educate people is Islam: What the West Needs to Know. It is available on DVD, and that's probably the best way to share it — buy some extra copies and keep them in circulation, eventually loaning them to everyone in your social circle.
But if you want to share it online, it is available on Google Videos in its entirety. Here it is:
"Islam: What the West Needs to Know" on Google Videos
It's a great overview of the basic principles of Islam, and why non-Muslims ought to be concerned about it.