Earlier today at the annual Niconico Chokaigi event, the Japanese publisher for Black Desert revealed the debut game trailer, which consists of footage from the Korean version together with some new elements. There is currently no schedule nor website available for the Japan server.
Over the weekend, there have been several short maintenances for the Korean Closed Beta 2 phase, and I had extreme difficulty moving about due to the massive lag. Seen below is the first open world boss players face, though the video was recorded in the middle of an insane lag spike.