Please find below the official trailers for the game, along with a few screenshots!
Connor Story Trailer
Inside Assassin's Creed 3 and the Making of Assassin's Creed 3
Boston Tea Party Trailer
Naval Warfare Walkthrough
Anvil Next trailer
E3 Boston demo with narration from Creative Director - Alex Hutchinson!
Here is the latest CGI trailer for ACIII
And in case you missed the E3 presentation, here's some gameplay!
And announcing Assassin's Creed III: Liberation for PS Vita!
Assassin's Creed 3 Liberation Dev Diary (NA)
Assassin's Creed 3 Liberation- Official Developer Diary: Liberty Chronicles (UK)