This video is a clip from a video game. The game appears to be set in a cave with icy terrain and lava flowing through it. The player is controlling a dragon that is flying through the cave. The dragon is seen flying over the lava, which is glowing orange and red, and over the icy terrain, which is blue and white. The cave is dimly lit, with stalactites hanging from the ceiling. The dragon is the only character visible in the video, and it moves smoothly through the cave.