You may want to create a directory to where you want to put your flv files.

$ mkdir /var/www/html/flv

$ wget -O /var/www/html/flv/flv.tmp http://www.youtube.com/watch?v=6T79yApVCBg

$ cat /var/www/html/flv/flv.tmp | grep video_id=

the output of cat will be

var fullscreenUrl = ‘/watch_fullscreen?fs=1&fmt_map=&hl=en&iv_storage_server=http%3A%2F%2Fwww.google.com%2Freviews%2Fy%2F&ad_module=http%3A%2F%2Fs.ytimg.com%2Fyt%2Fswf%2Fad-vfl51923.swf&video_id=6T79yApVCBg&l=1855&sk=o50Qu1roFX2Ah7jlj7adcgZ4RC2HCu3iC&invideo=True&t=OEgsToPDskLiESri-jpGFXRPqNeDPtUl&plid=AARVclllArJa09k9AAAC0ATiYQA&vq=None&iv_module=http%3A%2F%2Fs.ytimg.com%2Fyt%2Fswf%2Fiv_module-vfl51851.swf&tk=DbMWag4hglUatWOaI9bM5DbzFDhCPQiWxV7bkIhDz896O1IyTi9Ryg%3D%3D&title=Arby \’n\’ the Chief: The Movie (FULL)’;
var relatedVideoGridUrl = ‘/related_ajax?action_get_related&video_id=6T79yApVCBg&view_type=G&watch3=1&search=%20machinima%20animation%20games%20DigitalPh33r%20arby%20chief%20the%20movie%20halo%20comedy%20funny%20series’;
var relatedVideoListUrl = ‘/related_ajax?action_get_related&video_id=6T79yApVCBg&view_type=L&watch3=1&search=%20machinima%20animation%20games%20DigitalPh33r%20arby%20chief%20the%20movie%20halo%20comedy%20funny%20series’;

Take note of the video id along the lines of var fullscreenUrl. In this case it’s

6T79yApVCBg&l=1855&sk=o50Qu1roFX2Ah7jlj7adcgZ4RC2HCu3iC&invideo=True&t=OEgsToPDskLiESri-jpGFXRPqNeDPtUl&plid=AARVclllArJa09k9AAAC0ATiYQA&vq=None&iv_module=http%3A%2F%2Fs.ytimg.com%2Fyt%2Fswf%2Fiv_module-vfl51851.swf&tk=DbMWag4hglUatWOaI9bM5DbzFDhCPQiWxV7bkIhDz896O1IyTi9Ryg%3D%3D&title=Arby \’n\’ the Chief: The Movie (FULL)

to download it using wget

$ wget -O /var/www/html/flv/video.flv “http://www.youtube.com/get_video?video_id=6T79yApVCBg&l=1855&sk=o50Qu1roFX2Ah7jlj7adcgZ4RC2HCu3iC&invideo=True&t=OEgsToPDskLiESri-jpGFXRPqNeDPtUl&plid=AARVclllArJa09k9AAAC0ATiYQA&vq=None&iv_module=http%3A%2F%2Fs.ytimg.com%2Fyt%2Fswf%2Fiv_module-vfl51851.swf&tk=DbMWag4hglUatWOaI9bM5DbzFDhCPQiWxV7bkIhDz896O1IyTi9Ryg%3D%3D&title=Arby \’n\’ the Chief: The Movie (FULL)”

That’s it. Now that you have the flv, you can now convert it to other formats such as mov, mp4, etc.

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