They're saying that development is progressing smoothly, but the public test (beta?) has been pushed back to 2015. You probably figured it out just by watching, but in the two-player part, the players start out separately and then meet somewhere along the way; it sounds like this is a usual part of online play that can happen anytime. Treasure chests are lootable by both players so you don't have to compete; the glowing blue chest is apparently locked -- one player used a "Skeleton Key" magical item to open it, which unlocks it for both players. They're currently limiting dungeons to two players, but thinking about expanding it to three or four. The four player part is done through "multi-matching" (so, queuing / matchmaking / LFG kind of thing?), so you start together for certain quests. The first scenario, they're just trying to destroy all the creatures as fast as possible. Those are the big notes I caught.