You can e-mail videos from your BB to Facebook. When you go the mobile site (via Browser), then to pics and choose upload, at the bottom of the screen there will be an e-mail address for sending pics and vids. It is specific to your FB account. All you have to do is e-mail the pic.video to that e-mail address and it should be added to your account.
If you are just wanting to link a video, I'm not sure how to do that.