One of the new TV spots for OTP opens with a Snapey scene of the Potions Master being questioned by Dolores Umbridge about his failed applications for the Defense Against the Dark Arts Post. Here are the links...

Watch it on You Tube (thanks Selina Enriquez)
Download the Quicktime Version
Downlaod the Windows Media Player Version

Lower quality downloads and downloads of the less Snape-a-riffic TV spots and all the OTP trailers are available here