Now, this extension I can sink my teeth into. The VideoDownloader extension adds a small icon at the bottom of the status bar and a toolbar button at the top.
When you go to YouTube, or any other video web site, you can immediately save that video to your local hard drive. This extension will work with currently 60 video web sites, which are listed on their web site.
There is even a Best Videos feature available so you can view the videos directly from your browser. According to the web site, a new video appears every hour.
With YouTube being so popular, this extension is definitely part of my toolkit.