This video is a screen recording of a game where the player is building a structure. The player is using a tool to dig a trench in the ground and then pours lava into it. The lava flows down the trench and fills it up. The player then digs another trench next to the first one and pours more lava into it. The lava flows down the trench and fills it up. The player repeats this process several times, creating a pattern of trenches filled with lava. The game environment is a desert-like setting with sand and rocks. The player's inventory is visible at the bottom of the screen, showing various tools and materials available for use.