How to download video directly from youtube

For example, the video url is "http://www.youtube.com/watch?v=-_CSo1gOd48"

First you need to copy the text after "v=", it will be "-_CSo1gOd48"

Second, add it to this url "http://www.youtube.com/v/", full text must be "http://www.youtube.com/v/-_CSo1gOd48".

Visit "http://www.youtube.com/v/-_CSo1gOd48" and you will get a long long url:

"http://www.youtube.com/p.swf?video_id=-_CSo1gOd48&eurl=&iurl=http%3A//sjl-static5.sjl.youtube.com/vi/-_CSo1gOd48/2.jpg&t=OEgsToPDskLl39E8zxnT3Mk8o5yvBGvl"

We need the text after "&t=", it is "OEgsToPDskLl39E8zxnT3Mk8o5yvBGvl"

Now we have to make pieces together:

Get video url: "http://www.youtube.com/get_video?video_id="
ID: "-_CSo1gOd48"
&T: "OEgsToPDskLl39E8zxnT3Mk8o5yvBGvl"

The completed video download url is "http://www.youtube.com/get_video?video_id=-_CSo1gOd48&t=OEgsToPDskLl39E8zxnT3Mk8o5yvBGvl"

Ok, just paste this url into your address bar and press Enter!

GOOD: You can download any video from youtube by your browser.