Like most video hosting/streaming services, Vimeo does not provide data portability tools or expose an API for other hosting/streaming providers to use to move videos off their service.
Vimeo does allow users to download their own videos, but then uploading them again to a different service requires both bandwidth and storage as well as possibly a lot of time.
This Quora thread offers some ideas.
The source code (markdown) for this article can be found on GitHub.