Make sure the link toolbar is visible in your browser. You can enable it if you go to the View menu in your browser, click on Toolbars and check:
* Bookmarks Toolbar in Firefox
* Personal Bar in Opera
* Links in Internet Explorer
For Firefox and Opera, drag and drop the link below to the toolbar. For Internet Explorer, right-click on the link, select "Add to Favorites", ignore the security warning and choose "Links" from the list of folders (Internet Explorer no longer supports dragging bookmarklets).
The link toolbar should look like this:
Next time when you see a video you like on Google Video, click on the bookmarklet and save the video. Note that this only works for videos hosted at Google Video, not for YouTube or other third-party sites that are available from Google Video.
Because Google adds a non-standard header to the videos, not all players can render them. Some good applications that ignore the headers and play Google videos are Media Player Classic (Windows), VideoLan (Windows/Mac/Linux), MPlayer (Windows/Mac/Linux). If you want to remove the special header, so you can play the videos with Windows Media Player, try this small tool.