I watched that video and some commentary on it. If you can get a clear video of it you can actually see something come out of the volcano before the DEW hits. One of the guys I follow is big into UFO's and he says lots of UFO sightings are near volcanos as they hang out in them. His theory with this video is that a DEW was targeting the UFO in the volcano and it missed as you can see the small whatever it is escape just before the DEW streaks down. I don't know but it was a decent theory because it sure as shit wasn't a comet or meteor.