It must be viewed in fullscreen to see whats happening at the apex of the volcano.
You may want to fast forward to 6.32 in the Youtube video - this is where things start to get interesting.
Upon looking closer, it appears that some type of aircraft is exiting the volcano? Your opinions appreciated on this video. This must be the 100th video we have posted with unusual objects coming out of a volcano - We're still not sure what the connection is, but it's been occurring for many years.