I love a good video to tie into my lesson plans. Many times I use them to begin lessons so students can get an overview of the concepts I am going to present. One of the Web sites that I have found good videos for Technology concepts is Wydea. This Web site specializes in videos about Science and Technology topics. What they do best is answer the question "How does it work?" Everything from jet engines to E-mail to touch screens, and many more.
Check out this site and find a video to show your class!