Hovered, descended and ascended quickly, hovered, then disappeared

In the span of about seven minutes, I witnessed a light appearing in the shape of tic-tac, hovering for several minutes. It suddenly took a sharp turn and descended quickly at a 45 degree. After nearly losing sight of it behind the mountain, it split in three sections and quickly ascended back along the same angle. The tic-tac went back where had been, hovered a couple minutes, then quickly disappeared. A minute later, another section suddenly disappeared. The third section then disappeared behind the mountain. These pics and videos are in chronological order. (Unfortunately, when it first descended, I forgot to push therecord button.)