MSN Video
MSN offers free preview videos but requires users to sign-up for the service.
Note: MSN Video has been discontinued - this is from the MSN website:
Thank you for visiting MSN Video Downloads.
We appreciate your patronage of the MSN Video Downloads Service, however, this service has been discontinued as of December 13, 2006. After that date, video clips will no longer be delivered to your PC. In consideration for premium members a prorated refund will automatically be applied to the original credit card used to purchase the subscription.
To watch free streaming videos on your PC, please visit http://video.msn.com. MSN Video brings together a wide variety of entertainment content including high-quality original programming, leading sources of news and information, live and on-demand event programming, and user-generated contributions. Browse, watch, and participate to stay informed, gain perspective, have fun, and share your view with family and friends.
Internet TV Guide
If you haven't already you should look at monetizing your own website ...... and, of course: