The video shows a game of Super Smash Bros. Ultimate. The gameplay takes place on a stage that resembles a floating platform made of stone blocks. The characters in the game are Mario and Luigi, who are fighting each other. Mario is seen using a variety of moves, including punches and kicks, to attack Luigi. Luigi, on the other hand, is seen dodging and countering Mario's attacks. The health percentages of both characters are visible at the top of the screen, indicating the progress of the match. The gameplay is fast-paced and action-packed, with colorful visual effects accompanying each move.