How download the video from youtube?

The method download the video from youtube, had several methods that were used to download the video from youtube one of them was:
1. Be opened or visited the site www.dowint.net
2. Copy URL the video from youtube that would in download
3. Paste URL youtube to www.dowint.net
4. Pressed download and.....
5. Be waiting until the process download was finished. (the format of the video was *flv)