People are starting to post them up on YouTube (and yes, these are for PC ). The 2nd vid is long, but gives some handy tips and insight into how the mode works so I recommend taking the time.
Gameplay montage (3.5 min)
Longer Gameplay demonstration with commentary by player (10 min)
Gameplay montage (3.5 min)
Longer Gameplay demonstration with commentary by player (10 min)
Comment