How do you unlike an off-site page on facebook?

[Robo-Wolf]

So there was this video which came up on facebook homepage saying so-and-so liked it. And I clicked on it and it took me to youtube. But then it came up on the homepage saying that I liked it too, when I didnt even click like or anything.

How can I "unlike" this seen as it's not a facebook page, but a link to something off site.
I found it. When you're on your profile page you can cross it out and click "Remove Post and Unlike".

[G.A.P]

I couldn't find a way when it happened to me. Unless it sends annoying status uPdates just leave it.