Vimeo and Screencast-O-Matic go together well.

Screencast-O-Matic is a really easy to use Screen Capture Video Subscription that lets you capture what you are doing on your computer so that you can publish it in a meaningful way for your Clients.  Vimeo has a really amazing feature that allows you to replace a video so that wherever you have the video embedded or linked to on the internet will after replacing the video show the new video with which you have replaced the previous video.