download vedios without softwere

Me aap ko aik java script deta hon jab video buffering start kare to is script ko address bar me paste kar dein. Hai na interesting umeed hai pasand aya hoga?

javascript:if(document.location.href.match(/http:\/\/[a-zA-Z\.]*youtube\.com\/watch/)){document.location.href='http://www.youtube.com/get_video?fmt='+(isHDAvailable?'22':'18')+'&video_ id='+swfArgs['video_id']+'&t='+swfArgs['t']}