This service will let you generate URLs to fake out the Facebook link information generator. Basically: Facebook might show a picture of some puppies, but when your friends click on the link they're taken to a rickroll, duckroll, interior-crocodile-roll, et cetra. Just choose the real link, and the one Facebook will think you're linking to. Done.
If you choose a video for your fake link, Facebook will embed the video player for the fake video in the page. There is no way around this. As such, you should always choose an image or a web page for your fake link, even if the real link is to a video.