Here are 7 video.google.com searches for free educational and training videos covering the Microsoft Office applications: Word, Excel, PowerPoint, Outlook, Access, and Publisher, along with 2 links for free OpenOffice videos. These should give you a good flavor of what kinds of free videos are available at this site and how to search for them.
Free Microsoft Word Training Videos
Free Microsoft Excel Training Videos
Free Microsoft PowerPoint Training Videos
Free Microsoft Outlook Training Videos
Free Microsoft Access Training Videos
Free Microsoft Publisher Training Videos
Free Microsoft Office Training Videos
Free OpenOffice Training Videos
Free Open Office Training Videos
Free Microsoft Word Training Videos
Free Microsoft Excel Training Videos
Free Microsoft PowerPoint Training Videos
Free Microsoft Outlook Training Videos
Free Microsoft Access Training Videos
Free Microsoft Publisher Training Videos
Free Microsoft Office Training Videos
Free OpenOffice Training Videos
Free Open Office Training Videos