Is there software to download these videos?

KeepVid: Download and save any video from Youtube, Dailymotion, Metacafe, iFilm and more! (http://www.keepvid.com/?url=http%3A//www.askmehelpdesk.com/internet-web/can-you-download-youtube-videos-607116.html)

You can use YouTube downloader. Or the KeepVid I linked above. Keep Vid Free. There are several different downloaders you can use. I download YouTube stuff all the time. It's free, don't pay for downloading this stuff. There are pay programs but don't use them - use the above ones instead. Or you can download with Real Player program. You have to run the YouTube video and the pop up next to the video will come up with the Real Player download this video prompt.

Is there software to download these videos?

Yes, there are many softwares. But after using many free programme I prefer a paid one
ImTOO YouTube HD Video Converter, which is available for around $30.

You can also search in Google for "free youtube video downloader online"

With quotes intact and you will find many free ones.
Enjoy
Regards
Dhananjay