Extra Features:

• Directors' Commentary features Miles Luna, Monty Oum and Kerry Shawcross (at least, that's who I think this is, their introductions are fast and rather mumbled). As mentioned above, this is pretty raucous, including a few undeleted expletives along the way. But the guys are fairly entertaining and informative along the way, even if they spend way too much time discussing jelly beans (yes, jelly beans).
• Cast Commentary features Lindsay Tuggey, Kara Eberle, Arryn Zech, Barbara Dunkelman, who are only slightly less raucous than the boys. The women have a tendency to talk over each other, which makes hearing what they're saying a bit difficult at times, but they pass along a few little tidbits (like some Easter Eggs like a hidden reference to Doctor Who).
• Red Trailer (1080i; 3:29)
• White Trailer (1080i; 3:47)
• Black Trailer (1080i; 5:12)
• Yellow Trailer (1080i; 5:44)
• Behind the Scenes (1080p; 7:02) features Monty Oum and some of the rest of the crew discussing the genesis of the project.
• Fan Art (1080p; 4:41) shows the winners of a fan contest.
• RWBY Cosplay (1080p; 2:34) shows fans dressed up like their favorite characters.
• Chapter 1 Storyboard