There are number of ways to download and convert Youtube videos. Here is another cool web service ‘CatchYoutube’ to download and convert Youtube Videos - with an option for DVD format.
To get started, enter the URL of any Youtube video, select the format (like .DVD), hit the ‘convert and download’ button to download video in selected format.
Besides .DVD format, it also supports Mobile (.3gp), Mac (.mov), Audio Only (.mp3), Audio (.wav), Windows (.mpg), iPod/PSP/iPhone (.mp4) and Flash (.flv). Quick, simple and useful way to download favorite Youtube Videos on the fly with CatchYoutube. [Thanks Shodan]