After upgrading to Apple Mac’s Safari 5 browser I found that I could no longer double-click to download video files in the Activity window as I was able to do in earlier versions of the browser. It’s an option+double click now.
Navigate to the video in Safari.
Open a Window>Activity window.
Look for the download URL or website name.
Crank down the little triangle if need be — to expose a list.
Hold down the option key and double click on the video link to start a download.
When the download has completed, look for the video in your Downloads folder.
Here’s a cool video link you can practice on YourFaceIsASaxophone–Episode2