A Harry Potter and the Order of the Phoenix clip appeared on the Ellen show this morning. Here is the description from Leaky.

This scene featured Professor Dumbledore (Michael Gambon) introducing Professor Umbridge (Imelda Staunton) to the students in the Great Hall of Hogwarts, with reactions from Harry (Dan Radcliffe), Hermione (Emma Watson), Fred and George (James and Oliver Phelps). Also shown during the scene were the adult staff, including Professor McGongall (Dame Maggie Smith), Professor Flitwick (Warwick Davis), Professor Trelawney (Emma Thompson) and Professor Snape (Alan Rickman). The scene featured Harry speaking briefly to Hermione about Umbridge with Fred and George also commenting,however the bulk of it focused on Umbridge giving her speech, including her rather creepy giggle at the end.

I will have a link to a clip as soon as one is online!
Thanks Leaky!

UPDATE: See the clip in high-resolution HERE at HP Fan Zone