Don't istall this shit!!! this is a effing adware!!!
Tried about 5-10 other scripts, sites and add-ons that didn't work before I found this one, which worked on the first try. Excellent!
This was already invented as Tommy said but this script is a real improvement!
Most scripts required a java file to download the video and it took such a long time to convert the video after the download.
This script just downloads the video immediately and I easily up come to 1.2 mbp/s when downloading.
I downloaded this yesterday and I have already used it download a couple of videos. It redirects you to a nice looking download page that doesn't require java.