The first occurrence of game footage was a livestream by PtoPOnline. According to Game Informer, ptoponline.com focuses on "coverage and streaming of pre-release games, betas, and canceled projects."
There was also some alpha build footage, reportedly from a reel by developer Free Radical made in November of 2008, that was posted on Vimeo by Blue_Monkey.
The Star Wars franchise is now a licensing opportunity for developers and publishers following the closure of LucasArts.
[Thanks to everyone who sent these in.]