If you are looking for a way to pull videos from sites like Youtube, or simply convert movie files you may have into a format you can use, check out Zamzar.com. Zamzar allows you to paste the URL from the video you would like, then sends you an e-mail to let you know the conversion is complete. You can then download the video for use in Powerpoint or other programs. For those of you who have found videos on Youtube that apply to your content, but are concerned about other content on Youtube, this product is for you!
Check out this video on Cyberbullying from Digizen.org, a UK organization. The film features music by Ben Folds, and illustrates the multidude of forms cyberbullying can take. They also have a teacher guide if you are interested in using it with your students.