ClipGrab is a free downloader and converter for YouTube, Vimeo, Metacafe, Dailymotion and many other online video sites.
It converts downloaded videos to MPEG4, MP3 or other formats in just one easy step.
Downloaded videos can be converted to the following file formats: WEBM, WMV, MPEG4, OGG Theora, MP3 (audio only), OGG Vorbis (audio only).
ClipGrab isn’t limited to the sites listed above, because many more sites are supported "unofficially" through the automatic site-recognition of ClipGrab - just try it!
By the way, ClipGrab can also download HD videos from sites that have support for high definition (e.g. YouTube or Vimeo). More Info »