Studios tend to yank these, but you can see some of the more obscure nominees online:
Le Mozart des Pickpockets (no subtitles, a preview & director interview)
Clips from "The Tonto Woman"
Trailer for "I Met the Walrus"
"Madame Tutli-Putli" trailer:
"Peter & the Wolf" part 1:
"Freeheld" trailer w/ link to website: