Warner Bros released the “Harry Potter & the Deathly Hallows” Official HD Trailer, which already has 121,830 views and 1,193 comments in just a day. And if you search for “harry potter and the deathly hallows trailer” on YouTube, you will find 5,080 listings. One of these by Oldelaff has 3,158,143 views. A second by 0Tsunee0 has 1,603,363 views. And a third by theflyingpumpkin has 1,146,443 views.