All of the DH2 deleted scenes have been released online, and can be seen here.
Harry Potter the Quest released a new BTS feature on Harry and Dumbledore's relationship in the film series, focusing on Dan with Michael Gambon and Richard Harris, and featured new on-set scenes from King's Cross in DH2.
Harry Potter the Quest released a new BTS look at Ron and Hermione's relationship throughout the series, leading up to their kiss in DH2, and featuring the kiss itself and a bit of new on-set footage of it between Rupert and Emma.
WB released a trailer for the DH3 BD release in the U.S. and included new behind-the-scenes footage from the final battle.
WB Insider released a short new BTS video of Draco and Blaise surviving atop of mass of furniture in the RoR from DH2, which can be seen here.
Target released the first preview of Morgan Matthews' documentary on the making of the DH films, which will be part of the DH2 BD set this fall. That feature, with tons of new BTS clips from the final films, can be seen here.
Yahoo! released the first behind-the-scenes look at Ron and Hermione's kiss from DH 2, including a proper shot of their snog. That will be featured as part of the eight-part HP DVD/BD collection.