The UFO appears at the same time as a really amazing lenticular ‘UFO’ cloud hovers over the top of the volcano.
In addition, a strange phenomenon occurs at the top of the volcano, it is not clear whether it is a reflection of light or something related to the UFO phenomenon. See video.
Link to the volcano webcam and watch the amazing time-lapse video of the lenticular cloud.
Below a preview of the time-lapse video.