using www.keepvid.com, one can Download and save videos directly from Youtube, Google, Metacafe, Putfile and more. User needs to Simply copy and paste the url of streaming video and the rest of the work is done by keepvid.com.
The following websites are supoorted by KeepVid -
YouTube, blip.tv, Break, Clipfish.de, Clipser, Current, Dailymotion, eHow, Facebook, Flickr, Google Video, MegaVideo, Metacafe, MySpace, Ning, Photobucket, TED, Tudou, TwitVid, VideoWeed, Veoh, Vimeo, watchme.tv