how to free download videos from youtube? Help...

Personally I use Orbit Downloader. It's a program you have to install on your computer, but it is extremely fast, makes it very easy (one click) and can do almost any video site.

You've probably already found your answer but...This is my favorite YouTube video download source. It's never failed me.
http://keepvid.com/

you can use a youtube downloader tool. But very few software is for free.

you can try the free youtube downloader software for free

if you want to save and convert videos for high quality, their youtube downloader you can consider.
or you can use yahoo or google to search for more answers.

good luck!