Posted by Andrew.
I created a bookmarket to download YouTube Videos in Google Chrome on Oct 05, 2008. However, many readers leave comments to tell me that the bookmarklet can't work fine since last month.
I just checked the YouTube site and noticed that YouTube modified the video parameters. If the old bookmarklet can't work on your Chrome, please use this:
If you have any questions or advices about this bookmarket, please leave your comments.