Pastevid

Pastevid is a great site for taking a screencast (recording) and then sharing it w/ others via a unique URL.  This is free and offers a lot of features such as YouTube integration, etc.  However, there is a paid version which offers even more.

I highly recommend checking out Pastevid by clicking here.

For another similar site check out Screenjelly.

For a more detailed review check out David Andrade's wonderful blog.