I just stumbled across another one of these services this morning and figured on passing along the information.
http://www.keepvid.com/ Just paste the link of your youtube video in the edit field and shift tab once to the button that will start the process. Then just download the file. I am currently downloading a file over 1.6 GB in size so I figure it is safe to say they don’t seem to impose a limit on length of the video. David Ferrin Life is what happens after you have already made other plans. For answers to frequently asked questions about this list visit: http://www.jaws-users.com/help/