This small web based tool allow you to save videos from you-tube like sites into several format. Simple use. If you have further experience with this please let me know in comments. I have used it once and it worked well.
This one worked for me:
here’s anther one — did not work for some videos
An older tool that stopped working could be found here:
http://vixy.net/
more info:
http://howto.cnet.com/8301-11310_39-57405342-285/how-to-download-videos-from-youtube-vimeo-and-more/