Well, as many may know by now, the teaser trailer, a year in advance at that, is now released in theaters before Harry Potter 8. As soon as this happened, bootlegged videos of the trailer popped up on YT, and many people saw them. I however, got the news after Warner Bros took everything off the internet(Why? It's just a a trailer). Anyway, I probably won't be able to see HP 8, so I went around looking for the trailer. Man, it too me awhile, but I found a YT video with a link that has the legit teaser(be warned, I am not sure about the site in the link being safe, but it looked ok to me): LINK
Watch and enjoy, as long as that site is able to hold the video that is. Long live awesome films like these!
BTW official TDKR site here.