Wikivid creates video-courses made up of links to free video tutorials from
around the web. During our "alpha" stage, content is limited to software
tutorials only, but the vision is to add video uploads and more. Add your
own video links, edit existing pages, learn, & enjoy! Use this link to test your video settings.
The videos are short and pretty well planned. They are still in the building stage, so the choices are little bit limited, but still, there is a lot here. For example, what do you want to know about PowerPoint? They seemingly have a video that covers most queries.
Poke around on Wikivid and see if you find anything you can use.