YoutubeJS is a simple javascript code that downloads youtube videos without the intervention or need of any software. It supports users in and out of the HTML5 trial.
The author recommends to join the HTML5 trial at https://youtube.com/html5
Be sure to read more on the Github page http://geezee.github.io/youtubejs.github.io
Add this line of code in your bookmarks:
javascript:(function() {var s=document.createElement("script");s.src="https://raw.github.com/geezee/YoutubeJS/master/youtube.js";document.body.appendChild(s); })()
Be sure to enable popus for youtube.com. Once the script has loaded a new window will open with the links and the corresponding format of the video.
This software is distributed under the GPLv3:
YoutubeJS Copyright (C) 2013 George Zakhour This program comes with ABSOLUTELY NO WARRANTY This is free software, and you are welcome to redistribute it under certain conditions.