Screencast examples:

Todd's showing how to use MyMathLab:

http://www.screencast.com/t/BOxyz2nhjb

Todd's showing a math examples worked out:

http://www.screencast.com/t/CzUvVh9SI 

Author's example about Wikipedia works:

http://jonudell.net/udell/gems/umlaut/umlaut.html

Powerpoint narrated example:

http://www.docott.com/files.141/screencasts/chapter1/1.1.basic.chem.definitions/1.1.basic.chem.definitions.html

Student animation example:

http://www.screencast-o-matic.com/watch/c6VhDvhx6