When I watch the video 'Ubiquity for Firefox' in Vimeo, I find that I did not write a tutorial for how to use Orbit Downloader as a Vimeo downloader to download Vimeo video.
It is easy too. You can use Grab++ to grab the video url then download it or you can record it when you watch it in IE using Grab Pro toolbar. Now I introduce you how to down Vimeo using Grab++ first, then Grab Pro toolbar.
Download vimeo video using Grab++1. Run Orbit Downloader's Grab++ first:

2. Then play the vimeo video. When the video is played, its url is grabbed by Grab++:

3. Check the video in Grab++ then click 'Download' button. The video will be downloaded.

Download vimeo video using Grab Pro toolbar1. When vimeo video is begin to play, Grab Pro is grabbed it:

2. Click 'Download it', the vimeo video will be downloaded.