Google Video Downloader - Adds a button to the status bar to save videos from Google Video.
Media Pirate - The Video Downloader - Gives you the ability to save videos from approximately a dozen sites.
PimpFish Basic Toolbar - Capture video files from numerous sites.
UnPlug - Scans a web page for media players and tells you where the media files are stored so you can download them.
Video Download - Adds a simple right click command to download videos from numerous sites.
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