This is actually a bookmarklet.
“A bookmarklet is an applet, a small computer application, stored as the URL of a bookmark in a web browser or as a hyperlink on a web page.” – Bookmarklet as definded by Wikipedia.org.
1. In order to use the bookmarklet you will want to make sure that your “bookmarks bar” is tured on. This can do this in the “Customize and Control Google Chrome Menu”. That’s the long name for the little wrench icon in the upper right hand corner of the Chrome browser. Once you click on the little wrench, theres an option to “always show bookmarks bar”. Turn it on.
2. Now right click somewhere on the bookmarks bar and select “Add Page” from the download menu that appears.
3. The “Edit Bookmark” window will appear. In the “Name” field, write a descriptive name for the bookmarklet. I named mine “You-NOW-BE-My-Tube”.
4. Here’s the magic part. In the “URL” field, paste the following code:
javascript:window.location.href = ‘http://youtube.com/get_video?video_id=’ + swfArgs['video_id']+ “&l=” + swfArgs['l'] + “&sk=” + swfArgs['sk'] + ‘&fmt_map’ + swfArgs['fmt_map'] + ‘&t=’ + swfArgs['t'];
5. Click “OK”. There should now be a link in your “Bookmark Toolbar”.
6. Visit YouTube.com and find a target. My first download was the Obama Victory Speech.
7. Once the video starts playing, click the bookmarklet. At this point you should notice the download starting in Google Chrome’s download status bar at the bottom the the Chrome Browser window.
8. If you haven’t changed the Google Chrome download location, once the download is complete, you will find the video in your “MyDocuments\Downloads” folder.
9. The format of the file is “.flv” (Flash Video File), so you will need a viewer capable of playing .flv files to watch your new acquisition. One of my favorite FREE players out there is the “VLC Media Player“. It plays the .flv extension along with just about anything else. Another option is “PlayFLV” that enables Windows Media Player to playback FLV files.