Need a good video compressor

Hello,

Can someone suggest a good video compressor? I need it to compress videos downloaded from youtube, and I need to reduce their size so they can easily be transferred to mobile phone.

My computer's really old, running Win XP Home Basic.

Thanks in advance.

Format Factory http://www.formatoz.com/download/FFSetup215.zip

err.. the link isn't working. Any other suggestions?

Use Google and download from it's main website.