Hi Johan, the best programs you can use are the JDownloader (download here
http://jdownloader.org/) and the aTube Catcher (
http://www.atube.me/es/). The two have link grabs and gives you different download options. Both weigh little and run very well in Win7 and are also compatible for XP. Check in the case of the JDownloader if your operating system is 64 or 32bit.