Those movies have audio, so TURN ON YOUR SPEAKERS

These tutorials can be seen and heard directly on the internet using a Flash "plug in" which is an added functionality of your web-browser.

If your web browser does not have flash you will be prompted to install it.

You can also download those movies on your computer, they are in auto-executable files meaning, it will take a bit more time to download, but you will need nothing added to your computer to watch them.