This is my favorite Safari 5 extension.. its called FastestTube.
Download link: http://fastesttube.kwizzu.com/
i like this extension because its easy, fast and because you can download videos in HD :) it also works with Google Chrome and Firefox. good luck and feel free to leave a comment! :D thanks
---Links---
Twitter: http://twitter.com/AppleRV
My Website: http://www.applerv.tk/
