On 08/14/2010 11:42 PM, Philipp Überbacher wrote:
 One easy way to download is to use youtube-dl. The very latest version
 uses --best automatically, which results in a mp4 file in this case.
 Whether it is equal to the original I can't tell. 
Perl ethusiasts could try
http://www.jwz.org/hacks/youtubedown
Given the youtube url, it downloads the mp4