Here is is another cool browser bookmarlet which can grab any youtube video and put it on a blank webpage removing all surrounding clutter. You can then watch the video online and if you prefer share easily that page with friends.
Moreover, the URL of the page with the video can be also quickly shortened for easy sharing on sites like Twitter.
Works easy and there is no installation process, all you have to do is drag & drop provided bookmarklet on to your browser toolbar.
For details see the demo video below:
Check out QuietTube @ www.quietube.com