Two clips have been posted on Warner Brothers' official website from the Ultimate Edition DVDs that are due out on December 8.
The first piece is from the Sorcerer's Stone Ultimate Edition and contains a series of interviews with director Chris Columbus, Emma Watson, and Rupert Grint, detailing the casting of Hermione Granger and Ron Weasley.
The second piece is from the Chamber of Secrets Ultimate Edition and is one of the deleted scenes from the second film.
You can also watch the original theatrical trailers for both films on WB's site. And don't forget for all the latest info on the Ultimate Edition DVDs, click right here.
Thanks to Leaky for the tip!